Mafuyu is the no-nonsense, take-charge and hard-hitting leader of her high school gang. But when she gets expelled for being a delinquent, her mother, fed up with her daughter's wayward ways, sends Mafuyu to an isolated school far off in the country.

Hayasaka has been gloomier than usual since he hasn't been able to see Super Bun in a long time. Shinobu butts his ninja nose in and suggests Hayasaka and Super Bun go on date for Christmas Eve. Mafuyu very reluctantly agrees to play "matchmaker," and dons the rabbit mask to help cheer up her friend. But the date goes much better than she expected! How is she going to deal with Hayasaka now?