Is Yurumates 3D hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 2012 · 13 episodes · PG-13 - Teens 13 or older
Adult Cast, Seinen, Slice of Life
Yurume, an 18-year-old "ronin" and recent high school graduate, has high hopes of being accepted and attending Tokyo University. She moves into an apartment complex, the Maison du Wish, located on the outskirts of Tokyo where other ronins living there are studying for upcoming college acceptance exams.
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