Sahashi unintentionally saw a conversation between Natsume and Mr. Tanouchi and noticed a certain something.

The company starts receiving complaints against Natsume, and this makes his colleagues suspicious of him.

Natsume gets a promotion and becomes busy with his new responsibilities, but he gets sick and gets in a minor squabble with Sahashi.

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 take part in a competition, and their relationship changes from lovers to rivals.