Kyungsoo is the cute librarian-slash-book-blogger who reads and reviews books. Jongin is the unlucky author whose books Kyungsoo rants about. //   "You talk about how I can't write a good love story, about how I've obviously never even been on a date," says Jongin, his dark eyes glinting in a way that makes Kyungsoo's heart race. "So show me how to write romance. Give me something to write about."

Do Kyungsoo is a huge fan of the band XO, and an even bigger fan of Kim Jongin, stage name: Kai. Kyungsoo knows everything about the young man – birthday, height, blood type, everything. But what will he do when one day he runs into none other than Kim Jongin at 7-11?  

“Driving slow on Sunday morning, and I never want to leave.” It has been two years since Kyungsoo has seen his ex-boyfriend, Jongin. And then Jongin is at his doorstep again, begging to be let back into Kyungsoo’s heart.