Kazu Shimada studied at Reverse Cross High School in post-apocalyptic Tokyo and shared a romantic relationship with classmate Hiroko Uchiyama. Both fell prey to the creature Hamuko. Hiroko died before Kazu's eyes during the onslaught. Hamuko then inflicted critical facial trauma on Kazu by suctioning off his face before swallowing him completely. During a later confrontation involving protagonist Kakugo Hagakure, Hamuko regurgitated Kazu in a partially digested condition. Kazu expired from his wounds moments after expulsion. Kakugo incinerated Kazu's remains post-encounter.