Natsume can't get in touch with Sahashi, who is far away from home, and at the same time, he gets to know Harukawa in sales better.

Sahashi and Natsume start living together, and Sahashi notices that Harukawa's attitude towards Natsume seems to have an ulterior motive.

The appearance of Sahashi's older brother distresses Sahashi and makes Natsume start thinking about his future with Sahashi.