Old friends resurface in Nasa's life, as he introduces Tsukasa to his old teacher Yanagi Naoko.

Tsukasa and Nasa head to a big-name theme park, where they have a run-in with Nasa's old teacher, who might be in the middle of her own romantic encounter.

The Kusatsu trip continues, but will Nasa work up the courage to ask Tsukasa to join him in the hot springs?

Nasa's new students keep making unexpected appearances in his life, and Aya lets her imagination run away with something she saw on TV.