Free! -Eternal Summer-: Forbidden All-Hard! is a oVA anime that premiered in winter 2015, produced by Kyoto Animation.

About the production: the story comes from an original script, there is 1 episode of about 24 minutes and its current status is "finished".

Its main genres are comedy, slice of life and sports, with themes such as Primarily Male Cast, School, Ensemble Cast and Cosplay.

On AniList, Free! -Eternal Summer-: Forbidden All-Hard! has an average score of 76%, a very good score, and appears on 17,009 users' lists.

Unaired episode included with volume 7 of the Blu-ray/DVD.

Official synopsis from AniList.