Is Free! Movie 2: Timeless Medley - Yakusoku: Character Butai Aisatsu hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 2017 · 4 episodes · PG-13 - Teens 13 or older
Comedy
Character Stage Greeting Manner Special's shown before main movie. Later included on the movie Blu-ray and DVD release.
View on MyAnimeListShare
Check another title