Tenka no Daiakunin ni Tensei Shita Shounen, Hitatarashi no Daieiyuu ni Naru: Keikoku no Bishoujo-tachi to Eiyuugundan wo Tsukurimasu

Huang Tianfang, who reincarnated as the “World’s Greatest Villain” in the Chinese-style fantasy game 'Chronicles of The Legendary Sword Master', must find a way to survive. His first task to avoid the ruinous ending is to save his stepsister, Seirei, who is destined to become a seductive villlainess...

Source: MyAnimeList