Losing a diary is disaster. Especially when you wrote about your secret crush inside it. That is what happened to Oh Sehun. He didn’t know that his crush, Luhan had found the book and read its content. He felt touched because he find out that Oh Sehun really loved him eventhough he didn’t know who he is. Unfortunately, Luhan had to leave everything, including Oh Sehun when a tragedy hit his whole family.