EXO’s sub-unit, KAI & SEHUN (EXO-KASE), will release their first mini-album, "Waking Up The City," on December 1. The album consists of seven tracks in total, including the title track of the same name and individual solo songs for each member.

Born in 1994, KAI and SEHUN are the same age and have long been referred to by fans as the "94-line." Through this unit, the two will showcase their distinct charms via their performances.