While FL has been in a relationship for 7 years, she can't handle it maturely, whereas ML, a virgin since birth, handles his relationships professionally.
From episode 1 until the end, most of the characters engage in emotional cheating even though they are married and have children. They are still in love with the main character, and their husbands seem to approve of this behavior. This drama is about how to become a "simp" and a cuckold. Please dont watch this drama, its a disaster.