A father and siblings move into a new home. Unlike before, the house is small, so the siblings have to share a room. The younger brother starts noticing his sister as a woman. His sister's slender bare legs, her panties peeking out, catching a glimpse of his sister masturbating. His sister's body, which he never paid attention to before, now entices him. Unable to bear it any longer, the younger brother finally... A one-week story about siblings becoming female and male.
