First-year student Konomi Kasahara tries to find a mostly casual club to join when she comes across a rock climbing wall. Jun Uehara, a young prodigy climber, convinces her to try climbing, and Konomi quickly gets interested, using her puzzle solving skills to find ideal routes to the top. Jun is insulted by Konomi's carefree attitude and challenges her to a race to stay in the club.

The Hanamiya girls decide to train Konomi to improve her physicality so she can tackle tougher problems. Later, the girls head to a more rural area to do some bouldering with the infamous "Anti-Monkey Rock" that is difficult to climb.