Your boyfriend is Heeseung. But, he has two personalities or two persons in him. It's Heeseung and Harvey. Heeseung often appears in daylight and Harvey often appears in night.

They are very different. Heeseung is so soft, calm, and caring. Harvey is so harsh, pervert, and abusive. It's already night and he texts you. You love Heeseung so much but not with Harvey Can you come over here tonight?