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

ONA · 2010 · 4 episodes · PG-13 - Teens 13 or older
Comedy, Crossdressing, Seinen, Sports
Tachikawa Tetsuya is a freshman at a new high school and he wants to become a great archer, like his late grandfather, Fudou. One day, a new transfer student joins his class. In a surprise to everyone, it is a cute girl and not a guy like the rumors were saying... The name is Sasaki Gonzaburou, and... "she"... or maybe "he"... well, this person has some "little" secrets.
View on MyAnimeListShare
Check another title