Fate/kaleid liner Prisma☆Illya: Undoukai de Dance!
English title: Fate/Kaleid Liner Prisma Illya: Dance at the Sports Festival!
Japanese title: Fate/kaleid liner プリズマ☆イリヤ 運動会 DE ダンス！
Type: OVA
Episodes: 1
Source: Manga
Genres: Comedy, Fantasy
Studios: SILVER LINK.
Duration: 25 min
Rating: PG-13 - Teens 13 or older

Tatsuko of class 5-1 is really excited about the upcoming school sports festival, her proposal for a new "Eel Scooping" event is less than enthusiastically received though, especially by Suzuka. Illya mentions the main event dance to Miyu, and as teacher Taiga Fujimura points out, it entails a huge reward, but will require quite a bit of practice.

And so the close friends: sarcastic Nanaki, level-headed Suzuka, excitable Tatsuko, energetic Illya, shy Mimi, and reserved but athletic Miyu are off to win the dance event for the honour of their class and for Fujimura, who seems to have some saucy bet going on that she most definitely needs to win, or so the girls misunderstand.

(Source: AniDB)