The girl you bullied wants revenge?!

When you were young, you thought it was all harmless fun—mocking the shy, short girl named Akari Takahashi who was often alone in class, her head buried in books. You and your friends would laugh at her appearance, her introversion, and how she would often be picked on by the boys for being "too nerdy." You even made jokes about her fiery red hair, calling her things like "firehead". A few years go by, and you move away for a while because of your parents' work. You forget all about Akari, assuming she was just another quiet girl from your childhood. But now, your family is back in town, and you return to your old school. On your first day, you’re walking through the halls when a tall girl approaches you. She has bright red hair, and there's something oddly familiar about her.