Ep. 6: Nayu proposes bra assembly to maintain harmony within the Underwear Society group.
Aired on February 8, 2010

6
Nayu struggles with the distress caused by Kiyono Amahara’s behavior as a member of the Underwear Society. Kiyono is known for causing trouble, such as driving off Komachi by lifting her skirt and discarding underwear that Yako deems plain. To preserve the group's light atmosphere, Nayu suggests assembling a bra from scratch, ensuring Komachi can participate comfortably. As the girls engage in this activity, they gain deeper insights into Kiyono’s personality through her discussions on underwear design and makeup, revealing aspects of her character previously unknown to the others.
Episodes
- Ep. 2 · Nayu helps Yako after her bra fails during PE class
- Ep. 3 · Nayu seeks to join the Crafts Club but faces rejection over underwear display plans.
- Ep. 4 · Nayu recruits models for underwear guidance while Haruka overcomes insecurity.
- Ep. 5 · Nayu seeks support from Keigo and Komachi to form an underwear society after club dissolution.
- Ep. 6 · Nayu proposes bra assembly to maintain harmony within the Underwear Society group.
- Ep. 8 · The Underwear Society visits a seaside ryokan, leaving Komachi embarrassed after he wakes up in underwear.
- Ep. 9 · Yako’s awkward incident with Kota and Haruka’s confusion over her chest pain at the summer festival.
- Ep. 10 · Kiyono struggles with ill-fitting bras during a catalog shoot for her mother's business.