Originally a four-member group, MASC made their debut on August 19, 2016, with the release of their mini album titled "Strange." However, four years after their debut, the group announced their disbandment on October 17, 2020.

But there's good news for fans of MASC! On May 3, 2023, two group members appeared on JTBC's Peak Time and subsequently signed an exclusive contract with PCS Entertainment. This led to the group's reformation, now functioning as a duo. With this new chapter in their career, the group decided to change their official name to SEVENUS on May 9.

Exciting things are happening for SEVENUS! On July 11, 2023, the duo took to social media to announce the release of their first single album titled "Summús." This news has generated a lot of anticipation among fans, who have been eagerly waiting for new music from the group. And just a few days later, on July 16, 2023, they teased their fans with their very first set of concept photos, which has only added to the excitement.

It's clear that SEVENUS has come a long way since their days as MASC. With a renewed sense of purpose and a fresh start, the duo is ready to embark on this new chapter of their musical journey. Fans can expect great things from them as they continue to explore their sound and showcase their talent.

On July 25, 2023 they dropped their first teaser for title track Wonderland.