Getsuyoubi no Koibito-tachi

A young office worker finds himself drawn into a secret affair with a mysterious woman he meets on a Monday. Their encounters are intense and passionate, but they agree to keep their relationship purely physical, meeting only on that specific day of the week.

As they continue their weekly rendezvous, the boundaries of their arrangement begin to blur. He starts to develop deeper feelings, questioning the nature of their connection. The woman, however, remains guarded, hiding a past that complicates their future together. Their simple agreement becomes a tangled web of desire and emotional risk.