Ep. 15: School Marathon Race and Yui's Disappearance
Aired on July 14, 2010

15
After summer break, students face a 5000 metres marathon that Yui dreads. The course view from Sawako's car fails to improve her mood. During the race, Yui becomes distracted, and fatigue sets in for all runners. They attempt various methods to stay motivated. Upon reaching a steep hill, the group realizes Yui is missing and begins searching. Ui deduces Yui is at an old lady's house after injuring her knee. In the final stretch, Yui fears no mochi for the last place finisher. This motivates everyone to sprint. Mio, unwilling to be last, trips and rolls extravagantly across the finish line. The group enjoys red bean soup and rice cakes while Sawako continues her search for Yui.
Episodes
- Ep. 11 · The girls struggle with the heat and install an air conditioner despite Yui's allergy.
- Ep. 12 · The girls attend a mountain rock festival with Sawako's tickets and agree to perform next year.
- Ep. 13 · Azusa spends time with Ui and Jun, dreaming of the band before a festival outing.
- Ep. 14 · Ritsu and Tsumugi bond while Yui and Nodoka struggle with homework and cake strawberries.
- Ep. 15 · School Marathon Race and Yui's Disappearance
- Ep. 16 · Azusa attempts to practice with club members but faces various interruptions and distractions.
- Ep. 17 · The club room is closed for repairs, forcing the girls to seek alternative practice locations.
- Ep. 18 · Mio and Ritsu prepare for Romeo and Juliet roles while Azusa worries about concert rehearsals.
- Ep. 19 · Romeo and Juliet play preparation and overnight practice session at school