San E
On July 22, 2013, despite the conflict with his former label, Outsider made his first official comeback after being discharged from the military with the mini album "Rebirth Outsider" under his own label "ASSA Communication". The album's title track Bye U features G.O. of MBLAQ as Outsider's first idol collaboration. The album also features San E, Tymee (formerly E.via) and more.