HAIKYU!!: VS FAILING MARKS

In this episode, which takes place after the first season, Hinata and Kageyama fail a test and find that the make-up exam conflicts with their training camp. Note: The OVA was screened at Jump Festa 2015 on November 3, 2015. It was later bundled with the 21st volume of the manga. (Source: Hummingbird) — Description from AniList community (anilist.co).