Anime Crossover: Mastering the Heavens, Starting with Demon Slayer!

【Hardworking genius】【Making up for regrets】【High-energy power fantasy】【No harem】 In the main universe, he awakens to immortality, only to be strapped to an operating table and drained of blood. He transmigrates into Demon Slayer, follows Yoriichi and becomes his student. Chiyu is an extraordinarily hardworking genius who invents an entirely new Breathing Style. He becomes the strongest member of the Demon Slayer Corps, the Night King who rules Yoshiwara, and the leader of the Great Love God Cult. He brings the siblings Daki and Gyutaro under his command, saves the Kamado family, and even gives the Hashira guidance during the final battle before beating Muzan to a pulp. After transmigrating into Jujutsu Kaisen, he is the charismatic founding ancestor of the Zenin Clan, the secretive leader of the Time Vessel Association, the supreme authority at Jujutsu Headquarters, and the strictest father the cursed spirits could have. He is an absolute powerhouse, but what taught him to love, born from the loneliness that comes with such strength? In Naruto, he is the alliance’s supreme commander. In One Piece, he plays both sides, good and evil. In Bleach, he is a scientific genius… Looking back on Chiyu’s glorious life, his titles and names are too numerous to count! The story begins with a boy cursing on an operating table. It ends with him seated on a throne, ruling over countless worlds. The planned transmigration order is Demon Slayer, Jujutsu Kaisen, One Piece, Naruto, and Bleach. More may be added later. Whether I write an original story set in the main universe will depend on how well this one performs.