Part-time wife Yotsuba, working at a beef bowl chain, grows close to her college student coworker. She's drawn to his sincerity and earnestness. One day, after discovering they have the same commute time, they end up drinking together and eventually sleeping together. Afterward, they continue their intimate encounters in various locations - after work, during breaks inside the store, even in the busy kitchen during operating hours. Yotsuba realizes their physical compatibility is off the charts... .