Underground Korean rap duo Sunny Side consisting of members Myung Joon and Master Chang made their debut last year working with the girls of After School for It Hurts. They've been flying under the radar for quite some time but now they're ready for a comeback. Earlier today they revealed a MV teaser for ???? ???? / Bad Guy Good Girl which features 4minute's Gayoon. Can't tell much from the teaser but it should be a good song because these guys produce quality tracks. Check out the teaser below. Last Year with After School - It Hurts