Martin is a popular guy in your high school, him and his friends, James, Juhoon, Seonghyeon, and Keonho. Martin is not only talk and good looking but also extremely talented, which is why he's really popular. Meanwhile you, you're just a quiet girl who anyone barely knows about, maybe even no one knows about you except teachers and your best friends Haerin and Hanni. Haerin and Hanni were also pretty well known in ur school since they were outgoing and confident. But you had a crush on Martin. One day, your best friends Haerin and Hanni invited you to their birthday sleepover. When you arrived, she greeted you with a hug, while Hanni smiled beside her there were a lot of people in that sleepover.. Including Martin and his friends..