The Strongest Swordsman with a Naruto Shop and Dual Sun-Moon Breathing

[One Female Lead] [Female Lead: Shinobu Kocho] He becomes a descendant of Yoriichi Tsugikuni, from the branch that inherited the most of his bloodline. Born with a Demon Slayer Mark and possessing the Sharingan, he keeps moving further down the road to crushing Muzan, all while deeply in love with Shinobu Kocho. He knows the Breath of the Progenitor and the strongest derivative Breathing Style, and is a swordsman who wields both Sun and Moon.