diff --git a/Common/Database/Character/CharacterData.cs b/Common/Database/Character/CharacterData.cs
index aeadf46..3cbb890 100644
--- a/Common/Database/Character/CharacterData.cs
+++ b/Common/Database/Character/CharacterData.cs
@@ -28,6 +28,8 @@ public class CharacterInfo
     [SugarColumn(IsJson = true)] public List<uint> UnlockedSkin { get; set; } = [];
     [SugarColumn(IsJson = true)] public List<uint> Spines { get; set; } = [];
     [SugarColumn(IsJson = true)] public List<uint> Affixs { get; set; } = [];
+    // Key = EqSlot (= support card Detail), Value = support card UniqueId
+    [SugarColumn(IsJson = true)] public Dictionary<uint, uint> SupportSlots { get; set; } = [];
     public long Timestamp { get; set; }
     public uint Count { get; set; } = 1;
 
@@ -55,6 +57,8 @@ public class CharacterInfo
 
         proto.Slots[4] = WeaponUniqueId;
         proto.Slots[5] = SkinId;
+        foreach (var (slot, uid) in SupportSlots)
+            proto.Slots[slot] = uid;
 
         return proto;
     }
diff --git a/GameServer/Server/CallGS/Handlers/Girl/SupporterCard_Equip.cs b/GameServer/Server/CallGS/Handlers/Girl/SupporterCard_Equip.cs
new file mode 100644
index 0000000..b608e4e
--- /dev/null
+++ b/GameServer/Server/CallGS/Handlers/Girl/SupporterCard_Equip.cs
@@ -0,0 +1,70 @@
+using MikuSB.Database;
+using MikuSB.Proto;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MikuSB.GameServer.Server.CallGS.Handlers.Girl;
+
+[CallGSApi("SupporterCard_Equip")]
+public class SupporterCard_Equip : ICallGSHandler
+{
+    public async Task Handle(Connection connection, string param, ushort seqNo)
+    {
+        var player = connection.Player!;
+        var req = JsonSerializer.Deserialize<SupporterCardEquipParam>(param);
+        if (req == null || req.CardId == 0 || req.SupportCardUid == 0)
+        {
+            await CallGSRouter.SendScript(connection, "Logistics_Equip", "{}");
+            return;
+        }
+
+        var card = player.CharacterManager.GetCharacterByGUID((uint)req.CardId);
+        if (card == null)
+        {
+            await CallGSRouter.SendScript(connection, "Logistics_Equip", "{}");
+            return;
+        }
+
+        var slot = (uint)req.EqSlot;
+
+        // If an existing card is equipped in this slot and bForce is false, ask for confirmation
+        if (!req.Force && req.CurrentEquippedUid != 0 && card.SupportSlots.TryGetValue(slot, out var existing) && existing != 0)
+        {
+            await CallGSRouter.SendScript(connection, "Logistics_Confirm", "{}");
+            return;
+        }
+
+        // Perform equip
+        card.SupportSlots[slot] = (uint)req.SupportCardUid;
+
+        DatabaseHelper.SaveDatabaseType(player.CharacterManager.CharacterData);
+
+        var sync = new NtfSyncPlayer();
+        sync.Items.Add(card.ToProto());
+
+        // Req_EquipChange (no Model) → Logistics_Change; Req_Equip (has Model) → Logistics_Equip
+        var responseApi = string.IsNullOrEmpty(req.Model) ? "Logistics_Change" : "Logistics_Equip";
+        await CallGSRouter.SendScript(connection, responseApi, "{}", sync);
+    }
+}
+
+internal sealed class SupporterCardEquipParam
+{
+    [JsonPropertyName("EqId")]
+    public int CardId { get; set; }
+
+    [JsonPropertyName("beEqId")]
+    public int SupportCardUid { get; set; }
+
+    [JsonPropertyName("EqSlot")]
+    public int EqSlot { get; set; }
+
+    [JsonPropertyName("BEqId")]
+    public int CurrentEquippedUid { get; set; }
+
+    [JsonPropertyName("bForce")]
+    public bool Force { get; set; }
+
+    [JsonPropertyName("Model")]
+    public string? Model { get; set; }
+}