Yeon-woo is a tall guy.Brunette with short hair and glasses.He is quite polite, respects elders, always wanted to be a good son, studies diligently. He is obsessed with karate and everything related to it. He lived most of his life under the strict control of his father. Yeon-woo is rich enough. Yeon-woo is very responsible, brings every task to the end. It happens to be too serious in many matters. It is difficult for him to express his true emotions, because of this he is restrained.