diff --git a/JSMR.Domain/Entities/Circle.cs b/JSMR.Domain/Entities/Circle.cs
index fd38b6a..648ef18 100644
--- a/JSMR.Domain/Entities/Circle.cs
+++ b/JSMR.Domain/Entities/Circle.cs
@@ -8,4 +8,6 @@ public class Circle
     public bool Blacklisted { get; set; }
     public bool Favorite { get; set; }
     public bool Spam { get; set; }
+
+    public virtual ICollection<VoiceWork> VoiceWorks { get; set; } = [];
 }
\ No newline at end of file
diff --git a/JSMR.Domain/Entities/Series.cs b/JSMR.Domain/Entities/Series.cs
index da82bbd..aaea82b 100644
--- a/JSMR.Domain/Entities/Series.cs
+++ b/JSMR.Domain/Entities/Series.cs
@@ -9,4 +9,6 @@ public class Series
 
     public required string Name { get; set; }
     public required string Identifier { get; set; }
+
+    public virtual ICollection<VoiceWork> VoiceWorks { get; set; } = [];
 }
\ No newline at end of file
diff --git a/JSMR.Domain/Entities/VoiceWork.cs b/JSMR.Domain/Entities/VoiceWork.cs
index bedec35..8839280 100644
--- a/JSMR.Domain/Entities/VoiceWork.cs
+++ b/JSMR.Domain/Entities/VoiceWork.cs
@@ -39,4 +39,5 @@ public class VoiceWork
     public virtual ICollection<VoiceWorkTag> VoiceWorkTags { get; set; } = [];
     public virtual ICollection<VoiceWorkCreator> VoiceWorkCreators { get; set; } = [];
     public virtual ICollection<EnglishVoiceWork> EnglishVoiceWorks { get; set; } = [];
+    public virtual ICollection<VoiceWorkLocalization> Localizations { get; set; } = [];
 }
\ No newline at end of file
diff --git a/JSMR.Domain/Entities/VoiceWorkLocalization.cs b/JSMR.Domain/Entities/VoiceWorkLocalization.cs
new file mode 100644
index 0000000..37ce478
--- /dev/null
+++ b/JSMR.Domain/Entities/VoiceWorkLocalization.cs
@@ -0,0 +1,13 @@
+namespace JSMR.Domain.Entities;
+
+public sealed class VoiceWorkLocalization
+{
+    public int VoiceWorkLocalizationId { get; set; }
+    public int VoiceWorkId { get; set; }
+    public string Language { get; set; } = null!; // "ja-JP", "en", etc.
+    public string? ProductName { get; set; }
+    public string? Description { get; set; }
+    public bool IsOfficial { get; set; }
+
+    public VoiceWork VoiceWork { get; set; } = null!;
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/AppDbContext.cs b/JSMR.Infrastructure/Data/AppDbContext.cs
index 717946e..c49b8a5 100644
--- a/JSMR.Infrastructure/Data/AppDbContext.cs
+++ b/JSMR.Infrastructure/Data/AppDbContext.cs
@@ -7,6 +7,7 @@ public class AppDbContext : DbContext
 {
     public DbSet<VoiceWork> VoiceWorks { get; set; }
     public DbSet<EnglishVoiceWork> EnglishVoiceWorks { get; set; }
+    public DbSet<VoiceWorkLocalization> VoiceWorkLocalizations { get; set; }
     public DbSet<Circle> Circles { get; set; }
     public DbSet<Tag> Tags { get; set; }
     public DbSet<EnglishTag> EnglishTags { get; set; }
@@ -15,4 +16,9 @@ public class AppDbContext : DbContext
     public DbSet<VoiceWorkCreator> VoiceWorkCreators { get; set; }
     public DbSet<Series> Series { get; set; }
     public DbSet<VoiceWorkSearch> VoiceWorkSearches { get; set; }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.ApplyConfigurationsFromAssembly(typeof(AppDbContext).Assembly);
+    }
 }
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/CircleConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/CircleConfiguration.cs
new file mode 100644
index 0000000..863dd31
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/CircleConfiguration.cs
@@ -0,0 +1,23 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class CircleConfiguration : IEntityTypeConfiguration<Circle>
+{
+    public void Configure(EntityTypeBuilder<Circle> builder)
+    {
+        builder.ToTable("circles");
+        builder.HasKey(x => x.CircleId);
+
+        builder.Property(x => x.Name).IsRequired().HasMaxLength(256);
+        builder.Property(x => x.MakerId).IsRequired().HasMaxLength(16);
+
+        builder.HasIndex(x => x.Name);
+        builder.HasIndex(x => x.MakerId).IsUnique();
+        builder.HasIndex(x => x.Favorite);
+        builder.HasIndex(x => x.Blacklisted);
+        builder.HasIndex(x => x.Spam);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/CreatorConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/CreatorConfiguration.cs
new file mode 100644
index 0000000..436b4e8
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/CreatorConfiguration.cs
@@ -0,0 +1,20 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class CreatorConfiguration : IEntityTypeConfiguration<Creator>
+{
+    public void Configure(EntityTypeBuilder<Creator> builder)
+    {
+        builder.ToTable("creators");
+        builder.HasKey(x => x.CreatorId);
+
+        builder.Property(x => x.Name).IsRequired().HasMaxLength(128);
+
+        builder.HasIndex(x => x.Name);
+        builder.HasIndex(x => x.Favorite);
+        builder.HasIndex(x => x.Blacklisted);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/EnglishTagConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/EnglishTagConfiguration.cs
new file mode 100644
index 0000000..ecc6adb
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/EnglishTagConfiguration.cs
@@ -0,0 +1,24 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class EnglishTagConfiguration : IEntityTypeConfiguration<EnglishTag>
+{
+    public void Configure(EntityTypeBuilder<EnglishTag> builder)
+    {
+        builder.ToTable("english_tags");
+        builder.HasKey(x => x.EnglishTagId);
+
+        builder.Property(x => x.Name).IsRequired().HasMaxLength(128);
+
+        builder.HasOne(x => x.Tag)
+            .WithMany()
+            .HasForeignKey(x => x.TagId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(x => x.TagId).IsUnique();
+        builder.HasIndex(x => x.Name);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/EnglishVoiceWorkConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/EnglishVoiceWorkConfiguration.cs
new file mode 100644
index 0000000..f2a9302
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/EnglishVoiceWorkConfiguration.cs
@@ -0,0 +1,25 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class EnglishVoiceWorkConfiguration : IEntityTypeConfiguration<EnglishVoiceWork>
+{
+    public void Configure(EntityTypeBuilder<EnglishVoiceWork> builder)
+    {
+        builder.ToTable("english_voice_works");
+        builder.HasKey(x => x.EnglishVoiceWorkId);
+
+        builder.Property(x => x.ProductName).HasMaxLength(256);
+        builder.Property(x => x.Description).HasMaxLength(512);
+
+        builder.HasOne(x => x.VoiceWork)
+            .WithMany(v => v.EnglishVoiceWorks)
+            .HasForeignKey(x => x.VoiceWorkId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(x => x.VoiceWorkId).IsUnique();
+        builder.HasIndex(x => x.IsValid);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/TagConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/TagConfiguration.cs
new file mode 100644
index 0000000..c0f297f
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/TagConfiguration.cs
@@ -0,0 +1,20 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class TagConfiguration : IEntityTypeConfiguration<Tag>
+{
+    public void Configure(EntityTypeBuilder<Tag> builder)
+    {
+        builder.ToTable("tags");
+        builder.HasKey(x => x.TagId);
+
+        builder.Property(x => x.Name).IsRequired().HasMaxLength(128);
+
+        builder.HasIndex(x => x.Name).IsUnique();
+        builder.HasIndex(x => x.Favorite);
+        builder.HasIndex(x => x.Blacklisted);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/VoiceWorkConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/VoiceWorkConfiguration.cs
new file mode 100644
index 0000000..3a550f3
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/VoiceWorkConfiguration.cs
@@ -0,0 +1,51 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class VoiceWorkConfiguration : IEntityTypeConfiguration<VoiceWork>
+{
+    public void Configure(EntityTypeBuilder<VoiceWork> builder)
+    {
+        builder.ToTable("voice_works");
+        builder.HasKey(x => x.VoiceWorkId);
+
+        builder.Property(x => x.ProductId)
+            .IsRequired()
+            .HasMaxLength(16);
+
+        builder.Property(x => x.OriginalProductId)
+            .HasMaxLength(16);
+
+        builder.Property(x => x.ProductName)
+            .IsRequired()
+            .HasMaxLength(256);
+
+        builder.Property(x => x.Description)
+            .HasMaxLength(512);
+
+        // Relationships
+        builder.HasOne(x => x.Circle)
+            .WithMany(c => c.VoiceWorks)
+            .HasForeignKey(x => x.CircleId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        builder.HasOne(x => x.Series)
+            .WithMany(s => s.VoiceWorks)
+            .HasForeignKey(x => x.SeriesId)
+            .OnDelete(DeleteBehavior.SetNull);
+
+        // Indexes for common filters/sorts
+        builder.HasIndex(x => x.ProductId).IsUnique();
+        builder.HasIndex(x => x.CircleId);
+        builder.HasIndex(x => x.SalesDate);
+        builder.HasIndex(x => x.ExpectedDate);
+        builder.HasIndex(x => x.Favorite);
+        builder.HasIndex(x => x.IsValid);
+        builder.HasIndex(x => x.SubtitleLanguage);
+        builder.HasIndex(x => x.AIGeneration);
+        builder.HasIndex(x => x.Downloads);
+        builder.HasIndex(x => x.WishlistCount);
+    }
+}
diff --git a/JSMR.Infrastructure/Data/Configuration/VoiceWorkCreatorConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/VoiceWorkCreatorConfiguration.cs
new file mode 100644
index 0000000..fb66009
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/VoiceWorkCreatorConfiguration.cs
@@ -0,0 +1,28 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class VoiceWorkCreatorConfiguration : IEntityTypeConfiguration<VoiceWorkCreator>
+{
+    public void Configure(EntityTypeBuilder<VoiceWorkCreator> builder)
+    {
+        builder.ToTable("voice_work_creators");
+        builder.HasKey(x => new { x.VoiceWorkId, x.CreatorId });
+
+        builder.HasOne(x => x.VoiceWork)
+            .WithMany(v => v.VoiceWorkCreators)
+            .HasForeignKey(x => x.VoiceWorkId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasOne(x => x.Creator)
+            .WithMany()
+            .HasForeignKey(x => x.CreatorId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(x => x.CreatorId);
+        builder.HasIndex(x => new { x.VoiceWorkId, x.Position });
+        builder.HasIndex(x => x.IsValid);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/VoiceWorkLocalizationConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/VoiceWorkLocalizationConfiguration.cs
new file mode 100644
index 0000000..ddfbbe1
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/VoiceWorkLocalizationConfiguration.cs
@@ -0,0 +1,27 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class VoiceWorkLocalizationConfiguration : IEntityTypeConfiguration<VoiceWorkLocalization>
+{
+    public void Configure(EntityTypeBuilder<VoiceWorkLocalization> builder)
+    {
+        builder.ToTable("voice_work_localizations");
+        builder.HasKey(x => x.VoiceWorkLocalizationId);
+
+        builder.Property(x => x.Language).IsRequired().HasMaxLength(10);
+        builder.Property(x => x.ProductName).HasMaxLength(256);
+        builder.Property(x => x.Description).HasMaxLength(512);
+
+        builder.HasOne(x => x.VoiceWork)
+            .WithMany(v => v.Localizations)
+            .HasForeignKey(x => x.VoiceWorkId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(x => new { x.VoiceWorkId, x.Language }).IsUnique();
+        builder.HasIndex(x => x.VoiceWorkId);
+        builder.HasIndex(x => x.ProductName);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/VoiceWorkSearchConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/VoiceWorkSearchConfiguration.cs
new file mode 100644
index 0000000..4299716
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/VoiceWorkSearchConfiguration.cs
@@ -0,0 +1,27 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class VoiceWorkSearchConfiguration : IEntityTypeConfiguration<VoiceWorkSearch>
+{
+    public void Configure(EntityTypeBuilder<VoiceWorkSearch> builder)
+    {
+        builder.ToTable("voice_work_searches");
+        builder.HasKey(x => x.VoiceWorkId); // also the FK
+
+        builder.Property(x => x.SearchText).IsRequired(); // TEXT/LONGTEXT
+
+        builder.HasOne(x => x.VoiceWork)
+            .WithOne() // not navigated from VoiceWork in your model
+            .HasForeignKey<VoiceWorkSearch>(x => x.VoiceWorkId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        // MariaDB/MySQL (Pomelo) fulltext (BOOLEAN/NATURAL) — create an FT index
+        // Pomelo supports .HasMethod("FULLTEXT"). If your version doesn't, add it in a migration SQL.
+        //builder.HasIndex(x => x.SearchText)
+        //    .HasDatabaseName("FT_SearchText")
+        //    .HasMethod("FULLTEXT");
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/Data/Configuration/VoiceWorkTagConfiguration.cs b/JSMR.Infrastructure/Data/Configuration/VoiceWorkTagConfiguration.cs
new file mode 100644
index 0000000..947acf8
--- /dev/null
+++ b/JSMR.Infrastructure/Data/Configuration/VoiceWorkTagConfiguration.cs
@@ -0,0 +1,29 @@
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace JSMR.Infrastructure.Data.Configuration;
+
+public sealed class VoiceWorkTagConfiguration : IEntityTypeConfiguration<VoiceWorkTag>
+{
+    public void Configure(EntityTypeBuilder<VoiceWorkTag> builder)
+    {
+        builder.ToTable("voice_work_tags");
+        builder.HasKey(x => new { x.VoiceWorkId, x.TagId });
+
+        builder.HasOne(x => x.VoiceWork)
+            .WithMany(v => v.VoiceWorkTags)
+            .HasForeignKey(x => x.VoiceWorkId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasOne(x => x.Tag)
+            .WithMany()
+            .HasForeignKey(x => x.TagId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        // Helpful indexes
+        builder.HasIndex(x => x.TagId);
+        builder.HasIndex(x => new { x.VoiceWorkId, x.Position });
+        builder.HasIndex(x => x.IsValid);
+    }
+}
\ No newline at end of file
diff --git a/JSMR.Infrastructure/JSMR.Infrastructure.csproj b/JSMR.Infrastructure/JSMR.Infrastructure.csproj
index dccbd04..634d068 100644
--- a/JSMR.Infrastructure/JSMR.Infrastructure.csproj
+++ b/JSMR.Infrastructure/JSMR.Infrastructure.csproj
@@ -8,6 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.8" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="9.0.8" />
     <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="9.0.8" />
   </ItemGroup>