After getting permission to show their film at the cultural festival, the Pastime Club fervently discusses what they plan to wear for the big event. The conversation soon takes to the next level, and the three girls begin to put their costume ideas to the test. The Film Studies Club decides to write letters to their future selves in 15 years on the Macintosh computer donated by Chisato Higuchi's father. Despite setting ambitious goals and promises, reality turns out different than they expected. [Written by MAL Rewrite]

Asobi Asobase OVA was bundled with the seventh volume of the Asobi Asobase manga.