Living happily with only few to worry. Satisfied with the stable yet stressful job as an idol. And most of all, Jongwoon is sincerely loving his secret girlfriend. He has always kept her and their activities a good distance from the judgmental and harsh eyes of the media. His peaceful life flowed this way. On a fated day, someone from eleven years ago finds her way back to his side, unwillingly. It was someone else's choice, not hers. Call her innocent, she humbly accepts. But behind her is a story she regrets writing. Give her the title of "perfect", fine with her. Listen carefully to the songs she sings and you'll realize the "sickness" she has yet recovered from. His life is complicated? An undeniable fact, that is, after fate played with him. Kim Jongwoon has a heart, therefore only one. He cannot have both for it pains the pair. In the end, to whom can he wholeheartedly say, "Sincerely, all I want to say is just "I love you"?

You'll regret that you read the diary of Kevin Millard. (Book Cover Credits to @JSedrano )