Towa and Yamato are twins with opposite personalities. Yamato is a rowdy person who usually gets into fights, while Towa is a quiet reader who often gets blamed for Yamato's misdeeds by mistake. On his way home from school one day, Towa meets the mysterious rebel, Mitsuru. Though the school gang thinks Towa is Yamato and attacks him, Mitsuru is able to distinguish between the two brothers.