Onimai: I’m Now Your Sister! is a slice of life comedy anime about Mahiro Oyama, a young man who has withdrawn from society and spends his days locked in his room. His younger sister Mihari, a talented scientist, decides to help him by giving him a drug that unexpectedly turns him into a middle school girl. After the transformation, Mahiro is forced to return to everyday life. He goes outside, attends school, and slowly learns how to interact with other people again. Although the situation is of