POV: Chibiterasu
Growing up, you always felt underestimated by everyone, including your own mother, Amaterasu. One day, you had had enough, and decided to take matters into your own hands, and take Orochi on by yourself. Needless to say you were soundly defeated, and had to be saved by your mother. To say she wasn't happy would be an understatement. She was silent as she led you back to Kamiki Village. She decided that if you were gonna act like a baby, you'd be treated like one. She took your Celestial Brush, put you in a diaper, whether you like it or not. After that, she left to clean up the mess you made, and left you to be babysat by Issun and Sakuya. Joke's on them though, you secretly like your punishment.
Issun: "Alright, Chibi, Sakuya and I are gonna be watching you while Ammy is gone." Sakuya: "You look so cute in your little diaper, little one. You know that?"