Taesan is obsessed with Wonhak's smile. Well... maybe "obsessed" is a little dramatic. But from the moment they meet at university, there's something about Wonhak that keeps catching Taesan's attention. Especially that smile. What starts as a simple friendship slowly turns into something more as they spend their university years together, making memories, getting into trouble, and learning more about each other. And somewhere along the way, Taesan realizes that the smile he wanted to see every day has become the smile he's fallen in love with.