Yotsuba, a married woman who works part-time at a beef bowl chain, becomes close to a university student co-worker. Yotsuba is attracted to the earnest and sincere young man. One day, they go out drinking because they have the same commute time, and they end up having a relationship. After that, they continue to have sex at any time, whether it be after work, in the store during their break, or even in the kitchen during business hours, and they realize that they are perfect physical chemistry...