Koisuru Otome to Shugo no Tate -The code name is ''SHIELD-9''- (2007/06/29 Windows)
Koisuru Otome to Shugo no Tate -The shield of AIGIS- (2008/10/30 PS2)
Koisuru Otome to Shugo no Tate Portable (2010/07/29 PSP)