Yukine's husband is on a solo business trip, and her son has grown independent. Yukine leads a lonely life. One day, bored with the lack of stimulation in her daily routine, Yukine takes a job as a cleaner. There, she meets Toyo, a young employee at the same company. Toyo secretly watches Yukine changing in the locker room, captivated by her glamorous body, which is usually hidden beneath her plain cleaning uniform. Due to an unexpected turn of events, the two, who are a generation apart, grow close quickly. Yukine becomes entangled in the thrill of their secret affair within the company and finds herself drowning in Toyo's young, robust body…
