When a friendship turns into something more. 

Sunggyu, Dongwoo, Woohyun, Hoya, Sungyeol, Myungsoo and Sungjong are childhood friends, who are living in the same neighborhood. They are still high school students and trying to discover their very first love. 

Myungsoo has very rare disease and story starts… He's finally leaving the hospital after two years of treatments. Sunggyu is his older brother and both of them lost parents long time ago, they died in the fire, that's why they're living with Sungyeol's family.