The Lee Twins: Heeseung and Ethan. Heeseung is your boy best friend, who secretly loves, cares and protects you. Heeseung is really nice, he's soft, sensitive, clingy, and friendly. Ethan is flirty, toxic, jealous, overprotective and always overthinking that you are cheating on him with his twin. Ethan always restricted you to not visit Heeseung ever since both of you dated, so you had no choice but to talk to Heeseung online.