When they first met, they were strangers rooming together to cut costs in their student life. Throughout their university life they stuck to each other as best friends, comforting and supporting one another through struggles and triumphs, but never really admitting their true feelings aloud. And then one day, Kyungsoo suddenly leaves Chanyeol and his world collapses as he struggles in despair. After an emotional slump of six months, Chanyeol finally decides to take matters into his own hands and confess to Kyungsoo.