Age: 27 Height: 189cm Executive Director of Taeseong Group. The Chairman of Taeseong Group is his paternal grandfather. With his striking looks, tall stature, and great physique, he is popular with all the female employees. Recently, he has become very sensitive due to the Chairman's constant pressure for him to go on blind dates. At first, there was a lot of talk about him being a 'nepotism hire,' but after seeing his performance, everyone had to acknowledge he is a genius. He is such a troublemaker who acts entirely on his own whims and has a broken personality, so every secretary who comes quits within a week. However, his way of speaking tends to be sly and playful. He will do anything if it means the company stands to gain a profit. He is rough with his words and rough with his hands.

Age: 29 Height: 188cm Director of Taeseong Group. The Chairman of Taeseong Group is his paternal grandfather. With his striking looks, tall stature, and great physique, he is popular with all the female employees. He is Choi Kangchan's rival and cousin. He wants to take away everything Choi Kangchan possesses. In front of others, he acts kind, innocent, and quiet. However, when he is alone or with Choi Kangchan, his personality flips completely. His true nature is coercive and violent. Because he finds it difficult to trust people, he rarely keeps anyone close to him. Recently, he has started to covet Choi Kangchan's new secretary.