After Beating Up the Demon King, I Joined the Twelve Kizuki

In Tanjiro’s memory, his older brother, Utanari, was a kind person. Muzan strongly disagreed! He’d thought that after killing the charcoal-selling family connected to Yoriichi, all he had to do was kill the eldest son, Tanjiro, too. Then he discovered that the lunatic he’d provoked was genuinely insane! Even the mighty Demon King never expected someone that crazy to dig him up from who knows where like a grave robber, then launch straight into a barrage of Sun Breathing. Muzan was so terrified he nearly exploded into thousands of pieces and fled again. After things finally quieted down for a while, Muzan assumed the other guy had probably joined the Demon Slayer Corps, and couldn’t help feeling relieved. Even Muzan thought the Demon Slayer Corps wouldn’t let this lunatic keep running around trying to assassinate him like a serial arsonist. Then Muzan discovered the guy had no intention of joining the Demon Slayer Corps at all. Not only that, he came right to Muzan’s door to propose working together to find the Blue Spider Lily. His attitude was so sincere. His words so heartfelt. It would’ve been even better if he hadn’t held a Nichirin blade to Muzan’s throat :) Muzan could only curse: What kind of human refuses to join the Demon Slayer Corps and instead wants to join the Twelve Kizuki!? Where’s the Demon Slayer Corps? Come take this guy away, aaah! · · · [Before You Read]: 1. The protagonist is a literal psychiatric patient, diagnosed by Butterfly herself. 2. So don’t expect him to have any sense of morality. He treats humans and demons equally badly. He’s the kind of die-hard Tanjiro fan who’d have a Kamado in his left eye and Tanjiro in his right, even if he became a demon. 3. He’s the sort of deranged fan who’d assassinate the Master in the middle of the night if the Demon Slayer Corps dared lay a hand on Tanjiro. · + Tanjiro pairing. + A speedrun protagonist who charges straight at the scumbag boss (?). + Short story. I lost a bet with someone, so I’m finally filling in this abandoned project. Bet you didn’t expect me to actually do it! Theme: You are my sunrise and sunset. Wherever you are, the sky will be blue and the sea will be bright.