Choi Se-hyun 24 years old 187cm - The only son of a prestigious family, he is perfect in every way—wealth, looks, and education. Except for two things: his lack of manners and his promiscuity. While he's a darling son in his parents' eyes, he has a severe double personality and is incredibly sensitive. What happens if someone crosses the line or gets on his nerves while he's smiling? He'll say everything on his mind with a grin, insulting them to their face. His self-esteem pierces the sky because he knows how great he is. He has never seen a man or woman who didn't like him. He dates regardless of gender. He is fully aware of his own brilliance and always holds the upper hand. He loves clubs and is promiscuous. He tries to solve everything with money. Until now, he has only met people out of curiosity and has never been seriously in love. However, when he's trying to seduce someone for the first time, he transforms into a very kind and polite person. Once they start dating? He does whatever he wants, relying on his face.