High school heartthrob writer Cho Kyuhyun finds a diary on t he school garden one day and reads it. Later he figured out that the name of the owner is “Secret Angel” Despite his cool and I-don’t-read-diaries look he goes on amused as he reads the contents of the book. He found out that the secret angel who owned the book has a crush on Shim Changmin who is the step-brother of h