Is Yankee-kun na Yamada-kun to Megane-chan to Majo hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2015 · 1 episodes · PG-13 - Teens 13 or older
Comedy, School, Shounen
The official website for the Yamada-kun and the Seven Witches television anime series revealed on Sunday that the anime's first Blu-ray Disc and DVD box sets will include a Yankee-kun to Megane-chan collaborative manga and anime. (Source: ANN)
View on MyAnimeListShare
Check another title