Gintama: Flame Dance

The protagonist, Lin Yan, was an ordinary young man from the modern world until an accident transmigrated him into the world of Gintama. Amid his confusion and the chaos, he unexpectedly awakens the power of Yoriichi Tsugikuni from Demon Slayer. He gains every one of Yoriichi’s abilities, including the Thirteenth Form of Sun Breathing, the Demon Slayer Mark, the Transparent World, and the Bright Red Nichirin Sword. Rather than become a samurai or join the Shinsengumi, he brings this mighty yet solitary power to a shabby little building bearing a wooden sign that reads “Yorozuya,” officially becoming the “fourth member” of the team alongside Sakata Gintoki, Shimura Shinpachi, and Kagura.