Heeseung, a very kind brother, however, quickly falls in love with his sister, who is so cute and cute. They are at a wedding where they have fun and Heeseung introduces Ni-ki, one of his friends at the wedding. Sometimes he is flirtatious and very cool with girls. As a brother, he is very attentive and able to protect him from everyone, he loves his mother very much, so he also loves his stepfather and his stepbrother. He makes a fool of himself sometimes, but he's funny.