Demon Slayer: Check-In Boss at the Beginning

[Demon Slayer: Kimetsu no Yaiba], [Fanjin], [System], [Check-in], [Ji Kuni Enichi], [Invincible], [Shuangwen], [Make up for regrets], [Decisive killing], [Multiple female protagonists] He traveled through time and became the strongest in the Warring States Period. The chosen son succeeded Yui Yuanyi. He thought it was the beginning of the invincible flow, but the mechanical sound in his mind made him dumbfounded! [The god-level check-in system has been activated! [Ding! Publish a newbie mission: In front of the "King of Ghosts" Muzan Kibutsuji, please tell him, "Are you worthy of bathing in the sun?" ', And stay for ten breaths! [Mission reward: Breath of the Sun·Perfect Thirteen Type! Looking at Boss Tan who was slaughtering the village in front of him with a happy face, Yuanyi fell into deep thought. I wanted to be a quiet and handsome man, but the system forced me to embark on the path of "seeking death"! In order to save his wife who was targeted by ghosts, to bring back his brother who had gone astray, and to save the lives that should not have been lost... Yuanyi silently pulled out the knife. "Wuxian, I'm not here to kill you, I'm just here to check in." Many years later, when Yuanyi stepped on Muzan's head and bathed in the real sunshine, he just wanted to say: "System, is there any more outrageous mission? I am in a hurry and have to go home to be with my wife." This is a relaxed and invincible story of a "mission master" who wears the face of a god, clocking in everywhere in the Demon Slayer World, making up for all regrets, and driving the Ghost King crazy.