めだかボックス外伝 負ケ犬熊川

Two months before Misogi Kumagawa transfers to Hakoniwa Academy, he arrives as a new student at Suisou Academy and falls into an escalating month-long fight with classmate Saki Sukinasaki. Neither side wins: the confrontation ends instead with Suisou Academy itself shutting down. This two-volume spin-off fills the gap between Kumagawa's life before the main Medaka Box story and the person he becomes by the time he reaches Hakoniwa.