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The two subunits started out as a result of DIA preparing for their first ever solo concert 'First Miracle', during which the group unveiled their two units - BinChaenHyunCe and L.U.B - as well as their new singles! 

BinChaenHyunCe consists of Yebin (Bin), Jung Chae Yeon (Chaen), Ki Hui Hyun (Hyun), and Eunice (Ce). This unit will be releasing a song called "You're Moon, Earth", which the subunit members composed themselves, along with the help of fans live through Naver V app broadcasts. 

L.U.B stands for 'Lovely Unit B' and consists of Jenny, Eunjin, and Eunchae. Their song, also composed by the members, will be called "13/32", and means the 32nd day of the 13th month in a year. While domestic fans got to see both the DIA units performing their singles live at their solo concert, fans everywhere will be able to enjoy the new songs when they're released online! 

BinChaenHyunCe's digital single will be released December 29, and L.U.B's digital single, December 31. The two subunits also plan on promoting on music shows in January!