Natori Kotaro is a product development planner under cosmetics and bath products manufacturer "Lilia Drop" and is specialized in sniffing various scents. One day, Kotaro encounters an interesting smell and it turns out to be Yaejima Asako, an office lady from the accounting department who has a complex with her heavy sweating after being teased when she was a child. She often uses deodorant products in the bathroom and takes care of her "smell" while working.

While developing a new product, Kotaro pursues Asako and requests her to use the new product and let him sniff her for a week. As they interact more often, Asako gradually got attracted to Kotaro's straightforward thoughts while Kotaro began to notice Asako's charms.