It has been 9 years Byun Baekhyun and Park Chanyeol together as a lover. But everything has changed in the last 2 years. Actually it’s not baekhyun but chanyeol who’s changed. He isn’t chanyeol who is baekhyun met in the first year of their senior high school. The Happy Virus who’s always make baekhyun smile happily and fell in love. Chanyeol has changed. Everything has changed. But baekhyun’s heart