After the death of his sister, Rou, who had always been known as a hanger-on, becomes an explorer to investigate the circumstances surrounding her death. When he nearly loses his life in a dungeon, he acquires a mysterious ability to dismantle (disassemble) the corpses of monsters, supplies, and even skills. By breaking down various things, Rou grows stronger. Gradually, the mystery behind his sister’s death also begins to unravel…