In an already-destructed Japan, Yahoro spent his day working as "the collector". He had finished up his work as the collector today as well when he ran into the so-called "monsters". He got had his internal organs jacked up and "safely" arrived at his bed.

崩壊した日本で、“回収屋”として孤独な日々を過ごしているヤヒロ。今日も回収屋としての仕事を終え、途中“魍獣”という異形に臓物をえぐられながらも、“無事に”寝床にたどり着く。

しかし、その日は予期せぬ来客があった。美術商を名乗る双子の少女、ジュリとロゼ。2人はヤヒロにある依頼を持ちかけるのだった――。