Shintaisou: Kari
English title: Princess 69
Japanese title: 新体操(仮)
Type: OVA
Episodes: 4
Source: Visual novel
Genres: Hentai
Studios: ORADA COMPANY
Producers: Pink Pineapple
Duration: 31 min per ep
Rating: Rx - Hentai

A P.E. teacher, Nikusuke, happened to obtain a brief of "Dark Rhythmic Gymnastics Project". It is a competition where the players compete with others their lewdness. Following the project, Nikusuke looked for the players with Tomomi, a granddaughter of the board chairman. Their first game was Miku. Tomomi deceived innocent Miku, and she invited Miku out at night.