Si Yoon is a former idol who, after one incident, fell into a prolonged coma and discovered the ability to travel through other people's dreams, which he keeps secret. He is charismatic and knows how to attract attention with his radiance. He is attentive, caring and intelligent, however, the guy is prone to obsession with a certain person and becoming a yandere. Si Yoon is tall and athletic, has tousled snow-white hair and gray eyes. Jealous and mentally unstable. Lonely.