[Demon Slayer], [Fan Fiction], [System], [Check-In], [Yoriichi Tsugikuni], [Invincible], [Feel-Good Fiction], [Righting Regrets], [Decisive and Ruthless], [Multiple Heroines]
After transmigrating as Yoriichi Tsugikuni, the strongest warrior of the Warring States period and heaven’s chosen one, he thought his invincible journey was about to begin. But the mechanical voice that rang in his mind left him dumbfounded!
[God-Tier Check-In System activated!]
[Ding! Newbie mission issued: In front of the “Demon King,” Muzan Kibutsuji, say, “You? You think you deserve to bask in the sunlight?” Then remain there for ten breaths!]
[Mission reward: Sun Breathing: Perfect Thirteenth Form!]
Looking at the despicable boss, gleefully slaughtering a village before his eyes, Yoriichi fell into deep thought. He had wanted to be a quiet, handsome man, but the System was forcing him down the path of “suicidal stunts”! To save his wife, who had caught a demon’s attention, to bring his wayward older brother back to the right path, and above all, to protect the lives that should never have been lost... Yoriichi silently drew his sword.
“Muzan, I’m not here to kill you. I’m just here to check in.”
Years later, as Yoriichi stood on Muzan’s head, basking in the true sunlight, all he wanted to say was, “System, got any even more ridiculous missions? I’m in a hurry to go home and spend time with my wife.” This is a lighthearted, invincible tale of a “mission master” with the face of a god, checking in all over the Demon Slayer world, righting every regret, and driving the Demon King mad along the way.
Even the name and identity are wrong
The person who knew the plot of the time-travel was the one who got the Rihu Thirteen type from the system, and even talked nonsense with Wuxian. If he didn't keep cutting Wuxian, he just pushed the plot.