Rurouni Kenshin: the Two Prides of Kendo

(Semi-invincible + single female protagonist + half system) Swords are murder weapons, and sword skills are techniques for killing people. No matter how beautiful words are used to describe it, that is always the fact. He traveled through time and became Himura Takuya, as Himura Kenshin's brother. Kenshin's tragic childhood, the missed Yukiyoba in Kyoto, the encounter at Kamiya Dojo in Tokyo, and the amnesia wandering in China... The legend of Kenshin Ichi is rich and colorful. Now that I have come to this world, my stupid Oudou, let my good brother come to save you!