Big sister swimsuit wedgie
Takeo love his big sister, but he never gotten anywhere with her. That is until.. He discovered that when her butt gets wet, her personality switch to child.

Big Sister Little Sister ch1-4 (English) + After Story (Complete)
Mangaka: Nakayama Tetsugaku
Genre: Incest, Sister, Personality Change, Childish Side, Bloomers, Swimsuit, Mind Break
Size: 45MB 116pages

Preview Pictures:
Big Sister Little Sister Big Sister Little Sister Big Sister Little Sister Big Sister Little Sister