Is Quanzhi Gaoshou hentai?
English title: The King's Avatar
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

ONA · 2017 · 12 episodes · PG-13 - Teens 13 or older
Action, Video Game
Widely regarded as a trailblazer and top-tier professional player in the online multiplayer game Glory, Ye Xiu is dubbed the "Battle God" for his skills and contributions to the game over the years. However, when forced to retire from the team and to leave his gaming career behind, he finds work at a nearby internet café. There, when Glory launches its tenth server, he throws himself into the game once more using a new character named "Lord Grim." Ye Xiu's early achievements on the new server immediately catch the attention of many players, as well as the big guilds, leaving them to wonder about the identity of this exceptional player. However, while he possesses ten years of experience and in-depth knowledge, starting afresh with neither sponsors nor a team in a game that has changed over the years presents numerous challenges. Along with talented new comrades, Ye Xiu once again dedicates himself to traversing the path to Glory's summit! [Written by MAL Rewrite]
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