Yuki Tsukishiro is an honor student at his high school and a national judo champion admired by both his classmates and teachers alike．
But， he harbors a secret． A secret that Kei Arima， the ringleader of a band of delinquents one year younger than him， has become aware of．
One afternoon’s series of events culminates in the nurse’s office， when Yuki and Kei come face-to-face． As the door clicks shut behind them， Yuki’s secret is poised to unfold．
