A.C.E is a kpop group. There are five members: Jun, Donghun, Wow, Kim Byeongkwan, and Chan. They debuted on May 23, 2017, which is two days before my twenty-eighth birthday. Their debut single was called Cactus. Their most recent comeback song is called "Changer". Currently, at least two members have enlisted in the military, which they have to do before they turn thirty years as a Korean citizen. This is a bummer for me because I have to wait two more years before I can listen to a new song.
Learn more from their information page on Wikipedia.