[MUDR-187] I Became A Man And She Became A Woman. If You Keep A Boy And A Girl With G Cup Tits In The Same House For A While They Will End Up Fucking And Have SEX Like Rabbits. Mei Satsuki.

Sister Mei went to a boarding school but during the long spring holidays, she visits his brother.

They awkwardly discover their sexualities, with one another.

Based on a doujin with the same name.