ONIMAI: I'm Now Your Sister!, Volume 6 (ONIMAI: I'm Now Your Sister! #50-60)

It's his first summer break as a schoolgirl! Former twenty-something shut-in Mahiro Oyama was transformed into a girl by an experimental drug, and every day he's getting closer to being the model citizen his sister hoped to create! From late spring cleaning to early summer homework, gardening to junior high relationships, he can handle it all... but can he survive a trip to the beach with the girls?!