When Chanyeol first laid his eyes on Baekhyun he alsmost passed out. Chan-baek was planned by SM Ent. They knew that the shipment would attract fan-girls eyes and attention. So Chanyeol started to like Baekhyun. According to SM, Chan-Baek was the best shipment they had. In the dorm , Baekhyun quoted that he runs around the dorm with no underwear on to break the chain with Chanyeol. D.O also quoted that when Baekhyun doesn't feel good, Chanyeol come and comforts him