Oreshura - Season 1 Episode 9 Promises That Come Back are a Battlefield
Overview: Eita read Ai's delusions note by accident. As apologies, Eita accompany Ai to the local festival. Ai reveals herself to be Eita's childhood friend in kindergarten. However, much to Eita's surprise, they are also engaged to each other as their childhood promise. The club is reopen with Ai joining the club as club adviser.