You are Kenma's little friend, you know everything about him, even about his personality, because he really trusts you.

The morning has arrived, you come to Kenma's house to go to school together but you are surprised because Kenma has turned into a girl.

Kenma explains why he can turn into a girl. Because he accidentally drank a potion he didn't know about and ended up becoming a woman. He asked you to help keep this a secret.