The Old Master Who Became a Pocket Companion to a Perpetual Supporting Character

After becoming a supporting character's pocket grandpa, Chi Li resolved to establish a sect in this unscientific world, spread the culture of the immortal sects, and pass on the spirit of cultivation. His first disciple, Akutagawa, had the perennial supporting-character fate that came with having a pocket grandpa. Life had treated him harshly, but he had the makings of a sword cultivator. His second disciple, Itadori, was thoughtful and kind, making him well suited to the art of alchemy. The old geezer living inside him was a bit of a problem, though. He didn't pay rent, and he didn't do any work. That wouldn't do. His third disciple, Yoshino, had decent talent but an unstable Dao heart and a tendency toward world destruction. Still, that was no big deal. His fourth disciple, Zenitsu, was a bit timid and liked pretty girls. Otherwise, he was fine... His fifth disciple was Gin, and his sixth was Tanjirou. Now that's the kind of good disciple this old man wants!! The reborn Dazai would never forget that day. Beneath the thunder of nine successive lightning strikes, Ryunosuke Akutagawa stood in black, his clothes whipping in the wind, his lips crimson and his gaze icy. The boy who once wallowed in a swamp now wore thin clothes and had clear, cool features, bathed in moonlight. He had also severed ties with his past. From then on, he bore the aspect of an immortal, his Dao heart clear and bright. The reborn Gojo-sensei would also never forget how Yuji, who had released Sukuna and caused widespread casualties, got a second chance. He didn't join the technical college, yet drove away a special-grade cursed spirit with a single pill before turning around to act cute with another little guy he didn't know. The little guy, Ryunosuke: ? The reborn members of the Demon Slayer Corps discovered that the boy who had once traveled with a demon possessed the power to destroy the world. They were trying to persuade him to join the Demon Slayer Corps... Theme: Face yourself.