Hachiman tries his best to relax during Summer break and ignores the backlog of messages from Shizuka concerning the Service Club activities. Shizuka eventually manages to lure Hachiman out and takes the Service Club and other Soubu High students to a prefectural park in Chiba to oversee an elementary school Summer camp for a few days. During the orienteering event, Hachiman and Yukino bear witness to the deliberate shunning of the young Rumi Tsurumi by her peers, and the many failed attempts by Hayato to remedy the situation. Rumi senses a similar aura from Hachiman and Yukino and confides her problem to them, with Yukino adding that it would only snowball once she gets into middle school with the same people...