On the Compatibility Between Swordsmanship and the Demon Slayer Corps

"On the compatibility of swordsmanship and the Demon Slayer Corps" A story about a genius swordsman who travels back in time to the Taisho era, learns Japanese while killing evil spirits, and proves to the world that he is the best in the world. Among the Mu Mu brothers who only have swords in their minds, Zi Shuyan, who spends his days fishing and petting cats and not doing anything serious all day long, will always be the most special one. He originally thought that his life would reach its end in ordinary daily life, but he did not expect that one day after morning classes, he would step into the air and enter the Taisho era from the world of immortality. Zi Shuyan looked at the Demon Slayer Pillar in front of him, beheading evil spirits with one sword, and his sword heart, which had been silent for a long time, trembled faintly. Kill ghosts? I don't really understand, but in short, just swing the sword. ——"We, the Demon Slayer Squad, will live forever until all ghosts are slaughtered from this world." === Zi Shuyan, who cannot speak Japanese and is therefore considered mute, is the new face of the Demon Slayer Squad. He is as powerful as a tiger in one operation and has a battery life of three and a half seconds. ——Also I always accidentally hit my teammates together. As an output position that is always short of mana, Zi Shuyan learned from the experience and developed a special mana recovery technique: knocking on wisteria flowers. One day, I finally took a bite of a certain string from the Taoist Master of Thin Blood that haunted me: Grass! Why is it smelling like wisteria flowers? === A swordsman cultivator from the world of immortality travels to Demon Slayer, but he doesn't know the plot and settings of Demon Slayer. The cp has not yet been determined, there will be a magical change to the timeline, and all members of the Demon Slayer Team will be HE. Originally it was Kensan + Demon Slayer, but Kensan refused to write it, so I changed the text qaq Purpose: to drive away evil spirits