Start with a Fantasy Fruit and Ruin the City.

As soon as he traveled through time, he became Momonosuke's brother. Kozuki Yunryu thought he could become a "second generation national". But during the Wano Country rebellion, when being teleported by his mother, Mrs. Toki, Kanjuro, who was holding Kozuki Unryuu in his arms, took advantage of the chaos and threw Kozuki Unryuu into the space-time tunnel. Therefore, Kozuki Yunryu accidentally did not travel to twenty years later, but was inexplicably imprisoned in Impel Down City. Suppressing his desire for revenge, he activated the system in Impel Down City. After obtaining the superhuman fantasy fruit, he worked hard to hone himself in each world. Spells, demon slayer, death, onmyoji... When the gate to Impel City opens, Kaido, your death has come. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.