Nach dem Ende des Turniers steht eine neue Herrausforderung an, die es zu bewältigen gibt. Und eine überraschende Wendung. Welche, seht selbst.
The first-year students participate in an annual treasure hunt event, with Eruna paired up in a team with Otone, assisted by a Mecha Bimii. As Eruna clears the first set of checkpoints, Otone expresses her disinterest in teaming up with her and runs off. When Eruna injures herself after slipping off a cliff edge while searching for her, Otone takes her to her secret hideout to treat her injuries and have teatime with her. Things soon become hectic when Mecha Bimii transforms into a giant mech and goes on a rampage, but Eruna and Otone manage to use their combined abilities to make it out safely. Afterwards, as Otone agrees to help Eruna form her club-in-progress, Seisa grows concerned after witnessing Otone's Anticomplex ability.
新しい部を作るために新入部員を勧誘するエルナだったが入ってくれそうな生徒はおらず、おとねからも拒絶されてしまう。そんなとき端末に新入生のオリエンテーリングとしてトレジャーハントの情報が入ってくる。このイベントで活躍すれば、きっと新入部員がたくさん集まるはずと意気込むエルナ。しかしエルナはエルナを毛嫌いしているおとねとペアを組むことになり……。
신입생 오리엔티어링 행사인 트레저 헌트. 에루나는 세이사 선배에게 멋진 모습을 보이기 위해 잔뜩 기합을 넣는데. 그리고 에루나는 트레저 헌트에서 자신의 파트너가 오토네 인 것을 알게 된다.
