Ep. 12: Nayu moves away, causing Haruka to quit the Underwear Society after Tamaki's apartment burns down.

12

Following the cultural festival, Nayu announces her impending move to her friends. Haruka reacts with visible shock and immediately resigns from the Underwear Society. The situation worsens when Tamaki's apartment catches fire, pushing the group to the brink of disbandment. Feeling rejected by Haruka, Nayu worries she has lost another friend. Komachi visits Nayu to offer comfort and assurance that she is not alone, while simultaneously organizing new plans for the Underwear Society. On the day Nayu is scheduled to move, Yako intervenes to facilitate a conversation between Haruka and Nayu, allowing them to finally address their issues.