Choko, a 36-year-old woman with two divorces behind her and a teenage daughter to care for, enters into a friends-with-benefits arrangement with Kazuki, her former high school crush who works as a doctor in a women's clinic. Both hesitant to commit to a serious relationship, they opt for a casual fling, agreeing to simply engage physically whenever the desire strikes. However, as emotions resurface and external forces intervene, their pact faces challenges that test the boundaries they've set.