I take my first job at a beef-bowl restaurant to buy my girlfriend a birthday present. The only reason I survive the angry customers and unfamiliar work is Yumi, a kind married coworker who always helps me. During summer break, I discover my girlfriend is cheating, while Yumi learns that her husband has also been unfaithful. Seeking comfort in each other, we begin a sweat-soaked affair after work. We fuck at a hotel, in her home, in the office, and even inside the restaurant after closing, with my loads spilling deep inside her.