Keiichi RyoÌ"

• DEFENSE DEVIL 3 (Shonen Sunday Comics) (2009) ISBN: 4091220622 [Japanese Import]
• DEFENSE DEVIL 4 (Shonen Sunday Comics) (2010) ISBN: 4091221947 [Japanese Import]
• DEFENSE DEVIL 5 (Shonen Sunday Comics) (2010) ISBN: 4091223346 [Japanese Import]