第1話: 裏切りと死の末、借金地獄の少年がデビルドッグのポチタと合体し、チェンソーマンとなる。

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A teenage boy drowning in debt is forced to hunt down devils with his pet devil dog Pochita until he's betrayed and killed. In an unexpected turn of events, Pochita merges with his dead body and grants him the power of a Chainsaw Man! (Source: Hulu)