The club organised a meet-up to discuss Eru's uncle's mystery, at Eru's house, each member, consisting of Eru, Houtarou, Satoshi and Mayaka, presents their summary of research and their theories. When it is Houtarou's turn, he asked to use the toilet, then piece together his theory from all the member's presentation. He explains that Eru's uncle and other students might have negotiated with the teachers to not cut short the period of the Culture Festival, but the price is his expulsion from the school. As the mystery is solved all members left, Eru still wonders why she cried at her uncle's words.

Starring:

Genre:

Animation, Mystery