While on a mission with Rangiku to fight sword fiends, Haineko encounters one named Narunosuke, whose master was a coward, and who went with the others in order to become stronger. Haineko becomes friends with Narunosuke, sneaking him food and medicine despite Rangiku and the other Soul Reapers' belief that the sword fiends inevitably lose control of themselves and Narunosuke's gradual loss of control. Rangiku arrives to deal with Narunosuke and Haineko tries to stop her, but when Narunosuke loses control of himself, Haineko is ultimately forced to kill him.
Durante una misión de caza y captura de las Bestias Espada, Haineko se cruza con una Bestia Espada herida llamada Narunosuke y, para su sorpresa, se enamora del bello enemigo que tiene ante ella. Creyendo que Narunosuke es diferente al resto, ignora las órdenes y decide cuidarlo.
刀獣を追っていた灰猫は瀕死の刀獣・鳴之助と出会い、一目惚れをして鳴之助のもとへ通うようになる。乱菊に「刀獣は倒さなくてはならない」と忠告されたにもかかわらず、けがの手当てをしたり献身的に世話を焼く。
Haineko trova una Toju di nome Narunosuke. Dovrebbe ucciderla, ma è ferita e inerme e non ci riesce. Col tempo, Haineko si invaghisce dello spirito della Toju e cerca di tenerlo nascosto agli shinigami.