MOND-158 Ayaka Mutou is a female boss who ends up drinking and sleeping with a subordinate after overtime

The story follows an employee who stays late during a heavy overtime month, with his admired boss Ayaka Mutou sitting nearby. After finishing work, they miss the last train and decide to drink at the office. The drinking leads to a night together, and the next day they both act awkward but end up working overtime again, with the drinking repeating.