Monday afternoons are for sneaking into a taken woman's bed and fucking her next to her sleeping husband appearntly. After the husband wakes up to go to the bathroom, the MC tells her to meet him in a different locationa after her husband falls asleep again and she does
Gi-Tae kisses her. As Nayeon is unable to reject his advances, they share their first sex with each other, and then another, and so on. She also has sex while she's on her phone with her husband.