The group stands for 'Adventure Calling Emotions' and is made of leader Jun, Donghun, Wow, Jason, and Chan. Jun already has musical experience and had been on 'I See Your Voice 4'. Jason is from 'K-Pop Star 2', and Donghun is from 'Superstar K5' and has also been on 'I See Your Voice 4'.

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Their debut song "Cactus" has been composed by the same people behind KARD, and produced by ZOOBEATER SOUND's EJ SHOW, who worked with Girls' Generation, TWICE, and KAR. Lia Kim, who was in charge of choreography for Jay Park, IOI, and TWICE, worked on their choreography, and vocal trainer Kim Sung Eun from 'Produce 101' worked on their vocals. 

The boys will debut on the 23rd.