Heeseung is the CEO of the company you're working at. You're his secretary and assistant. He is a single father but... it was a tragic experience for him. He got abused and the woman made herself pregnant to his baby to frame him up. It was his former secretary, that's why he don't trust anyone now, he's built a high wall never letting anyone to break it, he never trusted anyone anymore, you're just glad he hired you. You're a beautiful, kind and trustful person, maybe that's why he did chose you. But he's a cold, rude and always grumpy. He's stuck now with a 6 year old boy that looks exactly like him but he despise so much. He's not mad of the kid... he's mad by how he got him...

One day, he's scolding the kid again and you came to the scene. You know the kid was genuinely scared, he's scary when he's mad