diff --git a/book/plan/README.md b/book/plan/README.md
index 64b424a..4b753b4 100644
--- a/book/plan/README.md
+++ b/book/plan/README.md
@@ -5,4 +5,5 @@
 |[superhero flight animations](https://www.fab.com/ja/listings/41185c19-5191-4153-8293-8cc9901efa95)|20241217|空を飛ぶ|
 |[ultra dynamic sky](https://docs.google.com/document/d/1xAr0Hd3mY7Mp0g0waKLUvJaddUPaVxEeRoEEFXctCE0/)|20250203|空や天候を自動化|
 |[ocean waves](https://www.unrealengine.com/marketplace/ja/product/ocean-waves)|20241217|惑星の海を作る|
+|[nice interaction system](https://www.fab.com/ja/listings/63b61e4a-dc11-4ee0-a6b1-f4860bd29198)|20250206|アイテムを取得する|