Kotaro Natori (Kanta Sato), who works as a product development planner at the cosmetics and bath products manufacturer 'Lilia Drop', is the ultimate 'smell fetish' who specializes in sniffing scents. One day, he encountered a very worrisome 'smell' in the corridor of the company and approached to be guided, and there was Asako Yaeshima (Yuno Ohara) who works in the accounting department! Asako, who had been teased as a 'sweat child' when she was a child with heavy sweating, she felt a complex with sweat and smell, and she kept her eyes open and secretly deodorant products in the bathroom. Is a daily routine. She took great care of the smell today, and as she walked down her corridor ... suddenly she smelled from behind her- !? Kotaro said, 'I was surprised at your smell.' Will be. Asako, who she thought was suspicious, left the place ... After that, Kotaro appeared in front of Asako many times, and she was supposed to smell every day for a week for product development. Sisters- !?