Is Seikon no Qwaser II hentai?
English title: The Qwaser of Stigmata II
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV · 2011 · 12 episodes · R+ - Mild Nudity
Action, Ecchi, Fantasy, Harem, School, Seinen, Urban Fantasy
Sasha is partnered with Hana as his new Maria. They infiltrate an all-girls academy, forcing Sasha to crossdress, in search of a Qwaser-related artifact called the Magdalena of Thunder which has appeared in one of the students. However, they have some competition in their search of it. (Source: ANN)
View on MyAnimeListShare
Check another title