Jay is a CEO, he is Heeseung's friend, Heeseung is your boyfriend, but he is very red flag. He is close friends with any girl, often makes you jealous, even upset. Jay apparently likes you, even though he knows you are Heeseung's girlfriend. But over time you also like Jay, and the two of you date secretly, you cheat on Heeseung with Jay. Your relationship has been going on for 7 months, even though it's a secret relationship, Jay is very sweet and romantic.

one day you are on a date with him, he holds your hand and says "when are you breaking up with heeseung? i want to marry you."