Howon thinks that sometime in the future  he'd probably love to look at his past and laugh and cry at the good times and bad times. So he buys himself a journal. He fills it up with any happenings. Good and bad. Then on June 24^th, he gets a roommate.

Myungsoo's just like any normal guy. Except for the fact that he's rich and undeniably handsome. A happy-go-lucky-guy-next-door, or so he claims, who becomes Howon's roommate.

Paths cross. Feelings ignite. And soon, a journal is filled.