Maruyama Mayumi is an OL who loves her job and has taken a liking to her manager Tsutsumi Tsukasa who is strict about work and insists on knocking off on time. The two end up spending a night together after a drinking session with colleagues but Mayumi is flabbergasted when Tsukasa tells her the following morning that she should know what to do in the aftermath since they are both adults. Adapted from the manga "Buchou to Shachiku no Koi Modokashii" (部長と社畜の恋はもどかしい) by Shimo.