BinChaenHyunSeu (빈챈현스S; also known as BCHCS) is the first sub-unit of DIA. They debuted on December 29, 2016 with the digital single "First Miracle DIAID I".
||Main Vocalist, Main Dancer
||Main Rapper, Lead Dancer, Vocalist
||Lead Rapper, Lead Dancer, Vocalist
||Lead Vocalist, Rapper, Maknae