Ever wondered why happy virus is his favorite endearment? "Happy - showing or causing feelings of pleasure and enjoyment because of your life, situation, etc.Virus - causative agent; infectious; spreads from one living person to another." ForewordChanyeol has always been a goofy guy. He is witty, cool and talented. Baekhyun admires him for that.But even if they were one of the closest buddies, Baekhyun still dont know why Chanyeol prefers to be called 행복병. He knows its the fans that came up with the term, he just didnt understand why Chanyeol said its his favorite. Baekhyun is a curious guy, he always has been.Why not Teeth-Rich? No, wait, scratch that thought!“Yeol, Why Happy Virus?” Baekhyun suddenly asks, lying on his stomach, flat on bed with laptop in front of him, reading articles & comments about exo in general.Chanyeol, whos sitting on his own bed while playing random tunes with his guitar, shifts his focus onto Baekhyun. "What do you mean?""I mean why do you prefer being called happy virus?"