Ano Oni Kyoushi ga Boku no Ane ni Narun desu ka?
あの鬼教師が僕の姉になるんですか？
A boy's father has remarried and begun living with his new partner. The stepmother has a daughter who is a teacher known for being difficult to live with. Outside of her role at school, where she is strict and challenging, she is described as gentle, timid, and fearful of insects.
