Onii-Chan Is Done For

Story:

Beautiful comedy manga tells the story of a good-natured young man Oyama Mahiro. One day an unsuspecting young man wakes up in the morning and discovers that he has turned into a girl. To put it mildly, this event slightly surprised Oyama, but he is not desperate. The guy is trying to figure out how it could have happened. Soon he finds out that it was his sister's mysterious drugs.