"Tentastic! Hello, we are PENTAGON!" PENTAGON (펜타곤) is a nine-member boy group under Cube Entertainment. They were formed through the competition reality show Pentagon Maker and officially debuted on October 10, 2016 with their self-titled mini album.
In December 2015, it was reported Cube will debut a new boy group within the first half of 2016. On April 26, 2016, Cube released a teaser video for the group. Prior to their debut, the final lineup would be determined through Mnet's reality survival show Pentagon Maker. At the end of the show, E'Dawn, Shinwon, and Yan An were eliminated with the remaining members to debut.