In a flashback several centuries ago, it is revealed that Kouga was part of the Kuchiki Clan as Ginrei Kuchiki's son-in-law, and was overconfident in the abilities of his zanpakuto. He helped put down a rebellion of Soul Reapers, but some grew suspicious of his power, and had him attacked. He cut down his attackers, but was framed for killing his own allies by a group of jealous high-ranking Soul Reapers. He was imprisoned as a result, but escaped with Muramasa's help. In the present, Kouga awakens, repelling Ichigo and Rukia, then suddenly stabs Muramasa.
Siglos atrás, el abuelo de Byakuya Kuchiki, Ginrei Kuchiki, y su yerno Koga Kuchiki, recibieron la misión de acabar con las fuerzas rebeldes que amenazaban al Seireitei. Con el poder de su Zanpakuto Muramasa, Koga acaba con los shinigamis renegados uno tras otro, y pronto su fuerza será bien conocida en toda la Sociedad de Almas. Sine mbargo, el propio Koga está frustrado porque su suegro Ginrei no parece reconocer sus logros.
数百年前。瀞霊廷では死神による反乱が発生し、白哉の祖父・朽木銀嶺、そして朽木家に婿養子として新たに加わった朽木響河が制圧に乗り出す。響河は斬魄刀・村正の能力を使い、次々と反乱分子の死神を倒していった。
In questo episodio, viene fatto un salto temporale a ritroso. Si raccontano le vicissitudini di Koga, adottato dal clan dei Kuchiki e poi ingannato da un gruppo di invidiosi.
