Is Souten no Ken: Regenesis hentai?
English title: Fist of the Blue Sky: Regenesis
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

TV · 2018 · 12 episodes · R - 17+ (violence & profanity)
Action, Historical, Martial Arts, Seinen
Long before Kenshirou said, "You're already dead," a different Kenshirou walked the violent streets of Shanghai. The city is in constant crisis as two mafia families battle one another for supremacy. In the crossfire, a little girl named Erika is orphaned and soon taken under the wing of martial artist Liu Fei-Yan. Sorrow seems to follow the girl, as every time Fei-Yan attempts to hand her off, her new guardians end up dead. Fei-Yan decides to bring the girl to a man named Guise but instead crosses paths with powerful Kenshirou Kasumi. (Source: ANN)
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