diff --git a/Legacy/Winters/ArcIFX.cs b/Legacy/Winters/ArcIFX.cs
new file mode 100644
index 00000000..cd9f6461
--- /dev/null
+++ b/Legacy/Winters/ArcIFX.cs
@@ -0,0 +1,67 @@
+//! \file       ArcIFX.cs
+//! \date       2018 Mar 06
+//! \brief      Winters resource archive.
+//
+// Copyright (C) 2018 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+
+// [020426][Winters] Kiss x 200 To Aru Bunkou no Hanashi
+
+namespace GameRes.Formats.Winters
+{
+    [Export(typeof(ArchiveFormat))]
+    public class IfxOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "IFX"; } }
+        public override string Description { get { return "Winters resource archive"; } }
+        public override uint     Signature { get { return 0x65; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.HasExtension (".ifx") || file.MaxOffset <= 0x10000)
+                return null;
+            var base_name = Path.GetFileNameWithoutExtension (file.Name);
+            var dir = new List<Entry>();
+            for (uint index_offset = 0x20; index_offset < 0x10000; index_offset += 0x10)
+            {
+                if (file.View.ReadUInt16 (index_offset) == 0)
+                    continue;
+                var name = string.Format ("{0}#{1:D5}", base_name, dir.Count);
+                uint offset = file.View.ReadUInt32 (index_offset+4);
+                var entry = AutoEntry.Create (file, offset, name);
+                entry.Size = file.View.ReadUInt32 (index_offset+8);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x10;
+            }
+            if (0 == dir.Count)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+    }
+}