Himitsu no Odekake
Caveats: Bukkake, Lolicon, Rape
Loli protagonista Ayame suddenly finds herself locked in the shopping center after a strange tremor strikes, leaving her alone with predatory men who are stranger-danger incarnate, with only a kindly old homeless man offering her refuge. As the point of the game isn't to fight your way out but to avoid them, Ayame is fairly helpless in battle, but her clothes are torn off as she takes damage regardless. Oddly enough, Ayame also has the option of prostituting herself in some shops in the mall.