Yuu doesn’t know which club to join, so her teacher suggests she join the student council. There, she finds a friend in Nanami, and perhaps something more...

As students prepare for the upcoming midterms, Yuu reflects upon Maki’s words. She tries to find a study partner and finds herself in the library with Touko.

A comment from Sayaka has Yuu inquire into the mystery of what happened seven years ago. Why are student council documents from that period missing?