Kyungsoo is the son of Park Chanyeol; he grew up with his father only so as time passed he got curious about her mom. One day he was cleaning at his appa’s room and he saw a box covered with dust. He opened the box and saw different kinds of stuffs. But the most thing that grabbed his attention is a picture of two boys and they look madly in love with each other. His father Chanyeol suddenly came and that’s… when the story

Before Baekhyun's death, he left a fountain pen... and... that Fountain pen has given luck to Chanyeol.... It also gave his way to come back to Baekhyun again.