Demon Slayer: From the Start, I Inherited Thunder Breathing with Kaigaku

[Demon Slayer] [Lighthearted Comedy] [The Protagonist Is Not Invincible] Chen Chuan unexpectedly transmigrates into the world of Demon Slayer. When he sees that his master is Kuwajima Jigoro and his senior is Kaigaku, he realizes he's taken Zenitsu's place. But unlike Zenitsu, he's somehow even more handsome than Giyu! In this world full of demons, he's fortunate to have memorized the Demon Slayer plot inside and out, and successfully unlocked the System. He gets a cracked version of the seven Thunder Breathing techniques, and can keep developing new moves according to his wishes. On top of that, there are... all sorts of other features that let Chen Chuan pull off one outrageous stunt after another. Heh heh heh... Chen Chuan: "I've found Upper Rank Two, Doma. Hashira, gang up on him!" "What about Upper Rank One?" Chen Chuan: "I sent Kaigaku after him." But as time goes on, he also discovers that he and the System seem to...