Eunhyuk is an 18 year old boy who went to visit his moms side of the family where they live really close to the beach. Eunhyuks cousin Heechul owns a gift shop on the beach where you can buy souviners, bikinis, swimming trunks and ect ect, Eunhyuk doesnt want to be bored all summer with nothing to do then just be with his family since his friend Kyuhyun who also lives there is a lifegaured who cant hang out with him as much because of his job, so he decides to ask his cousin for a job. 

Kyuhyuns 15 year old Cousin Donghae goes to the beach with his friends to relax, they're always at the beach beacause they grew up living with it. When Donghae see's Eunhyuk working at the shop (Shirtless) he instanlty goes in to the shop to see this guy, he ends up liking him then finds out he is friends with his cousin! He thinks that this years Summer is seriously going to be HOT.