Super Junior (Donghae & Eunhyuk) is a sub unit signed to SM Entertainment. Donghae and Eunhyuk have always been notibly good friends with each other within Super Junior. So no one was really surprised when SM announced they were forming a sub unit together. The album gained immediately popularity within weeks of it‘s release. Their title track “Oppa, Oppa“ has a disco feel to it while Donghae‘s self written tack, “First Love“ is a soft but powerful ballad.