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

TV · 2012 · 11 episodes · PG-13 - Teens 13 or older
Comedy, Gourmet, School, Seinen, Supernatural
In the second season the story continues exactly where it left off previously. Professor Itsuki's Fermentation Cellar and laboratory is ready for operation and with Sawaki Tadayasu's unique gift to see and communicate with microbes to help, Itsuki's motley group of students begin to process different fermented products like soy sauce and sake. (Source: ANN)
View on MyAnimeListShare
Check another title