A.C.E (Hangul: 에이스; an acronym for Adventure Calling Emotions) is a five-member South Korean boy group formed by Beat Interactive. The group made their debut on May 23, 2017 with release of a digital single "선인장 (CACTUS)". The quintet consists of Jun,Donghun, Wow, Kim Byeongkwan (formerly known as Jason) and Chan. Jun trained under Jellyfish Entertainment alongside VIXX for a short time then trained for three years with CJ E&M. Donghun competed on Superstar K5 but was eliminated during TOP8. He also made appearances on I Can See Your Voice in which he ended up winning, earning high praise from GOT7's JB as well as the audience. Wow trained at YG Entertainment from the age of 19 alongside Winner. He later moved to CJ E&M where he met Jun and Donghun. Kim Byeongkwan participated in Season 1 of K-pop Star but was eliminated during Casting Final round. Kim Byeongkwan also trained under JYP Entertainment alongside Chan. On September 18, 2017, It was announced that Jun joined KBS' idol rebooting show The Unit. Chan was later announced to be joining him as well. They successfully passed the auditions, each receiving four mentor boots. On November 5, Donghun, Kim Byeongkwan and Wow were announced to also be participating in a survival show: YG Entertainment's MIXNINE. All of them passed the audition and recieved praises for their performance from Yang Hyun-suk.