Me and Cheat and a Sex Change!?～Me and cheat and a sex change～

The everyday life until now, a false everyday life. The extraordinary days ahead, a true everyday life. The daily life of Yamada Yuki (山田優希), who was supposed to be an ordinary male student, was greatly disrupted by the return of his younger sister, Yamada Saki (山田紗季), who had gone missing five years ago. However, the extraordinary was what was originally meant to be...