SEVENUS (세븐어스), formerly known as MASC is a male duo consisting of Heejae and Ireah under PCS Entertainment. Formed by JJ Holic Media and Lotus E&M as a four-member group, they debuted on August 19, 2016 with the mini album Strange.

On May 3, 2023, following MASC's appearance with two members on JTBC's Peak Time, they signed an exclusive contract with PCS Entertainment, therefore reforming the group as a duo. On May 9, the group changed its name to SEVENUS. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.