In the first round of MBCŌĆÖs The Masked Singer, which aired on Sept. 20, the competition between the ŌĆ£Butthumak CatŌĆØ and ŌĆ£Seo Dang-gaeŌĆØ took place. The two exchanged each verse and filled the stage to the song ŌĆ£I Knew I LoveŌĆØ and were highly praised by the judges. In the following results, ŌĆ£Seo Dang-gaeŌĆØ was defeated, and her identity was revealed to be a former announcer Lee Hye Sung, drawing attention.

After the stage, viewers started to speculate that ŌĆ£Butthumak CatŌĆØ may just be HighlightŌĆÖs Yang Yoseob, showing enthusiastic reactions. Yang Yoseob made his debut as boy group BEAST in 2009 and served as the groupŌĆÖs main vocalist. He was recently discharged from the military on Aug. 30. https://www.instagram.com/p/CEiYysiD4S8/ Source (1)