Group doubaku system

(C63) [MGW, Uni Matrix One (Isou Doubaku)] Bridgex (Guilty Gear XX)

(C52) [DOUBAKU SYTEM(Isou Doubaku)] TRUE LOVE MAGIC FIRST STEP 1.2 (True Love Story)

[MGW (Isou Doubaku)] Pure Mind LIMITED EDITION (Natural ~Mi mo Kokoro mo~)

(C53) [DOUBAKU SYTEM (Isou Doubaku)] Isou Doubaku Sakuhinshuu WORKS (Various)

[Doubaku System, Ginza Taimeiken (Various)] Choutoppatsu! Mizutani Fan Book Ver 1.2 (Dousoukai)