Tsukasa, a 27-year-old office lady working at a company along the Yamanote Line. After breaking up with her boyfriend, she decided to cut her hair short and try an erotic part-time job for the first time to relieve stress. Usually, she secretly indulges in masturbation while watching videos, and now she reveals that hidden passion amid work fatigue and heartbreak. Busy every day and overwhelmed with stress, she meets a well-endowed stud whose intense encounters make her body burn with desire. Experience the raw, intimate daily life of a real office lady where mature charm and sorrowful emotions intertwine.