A.C.E

Jun appeared in the show I Can See Your Voice 4 while Jason appeared in K-Pop Star 2. Donghun also had appeared in the reality shows I Can See Your Voice 4 and Superstar K5. On May 23, 2017, the group made their debut with the single album "Cactus".

On October 10, A. C. E announced their first-ever comeback.

Their second single album, "Callin'", was later revealed to be releasing on October 18. In late 2017, Jason, Donghun, and Wow participated in the reality show MIXNINE while members Chan and Jun participated in the KBS 2TV reality show The Unit. Jun was unfortunately eliminated in the 14th episode of The Unit, which was aired on February 3, 2018.

Chan, on the otherhand, had made it to the final lineup for the project group UNB. He will be inactive in A. C.

E so that he could participate in UNB. Meanwhile, Jason and Donghun had made the final lineup, which was revealed on the final episode of MIXNINE on January 26, 2018. Unfortunately, Wow was revealed to have been eliminated in the same episode.

On March 14, 2018, they announced a special digital single as a thank you to their fans called "5TAR (Incompletion)", which was released the followin day. Chan was unable to participate in the single's recording. On May 3, it was confirmed that the project group consisting of the winners from MIXNINE would not be debuting.

The final lineup was meant to include Donghun and Jason. On May 9, Beat Interactive announced that A. C.

E will be making a comeback in June as four members. On May 23, the agency confirmed that A. C.

E will be releasing new music on June 7. Additionally, it was announced that Jason will now be using his birth name, Kim Byeong Kwan. On May 23, the group dropped the first teasers for their first repackage album A.

C. E Adventures in Wonderland. On August 1, it was officially announced that Chan would be participating in A.

C. E's stage at the 2018 Korea Music Festival, which was to take place the next day on August 2. It was to be the first time they perform "Take Me Higher" with all five members rather than four.

On May 2, 2019, A. C. E announced that they will be coming back on May 17 with their first mini album, later revealed to be titled Under Cover.

On August 29, they made their Japanese debut with the digital single "All I Want Is You". On October 7, Beat Interactive announced that the group will be making a comeback on October 29 with their second mini album, later revealed to be titled Under Cover : The Mad Squad. On March 29, 2020, they made their first Japanese comeback with the digital single "My Lover".

On May 21, it was revealed that the group's light stick would be released on May 23, the day of their third anniversary. On June 24, they released the song "Stand By You" as a pre-release single. On August 17, it was officially announced that A.

C. E would be making a comeback on September 2 with their third mini album HJZM : The Butterfly Phantasy. On January 3, 2021, the group announced a remix version of their song "Fav Boyz" titled "Fav Boyz (Steve Aoki's Gold Star Remix)", set to be released on January 8.

It was the first release in their A. C. E Project.

On February 5, it was announced that Swing Entertainment and Beat Interactive would be co-managing A. C. E.

Beat Interactive would be focusing on artist production and global marketing while Swing will be in charge of artist management. On April 2, Beat Interactive released a statement revealing how Wow would be going on a hiatus to focus on recovering. The statement also mentioned how he would not be participating in their upcoming release so that he could recover.

On April 11, they announced their first English digital single "Down", which was released on Ap...