The "LO OK" music video serves as a showcase for the sub-unit members: Eunice , Huihyeon , Yebin , Chaeyeon , and Somyi .

: The music video was directed by Youngeum Lee , with Jiyoo Seo and Dongjun serving as producers.

: While BCHCS released "LO OK," a second sub-unit, L.U.B (Lovely Unit B), released their own music video for the track "Darling My Sugar" just one day later on August 18, 2017.

Get a breakdown of each member's . Look for live performance stages of "LO OK." DIA (group) - Kpop Wiki

: Critics have described the track as a zippy synth-funk song, noted for its "convincing self-flattery" and energetic production.

The release of "LO OK" was part of a larger promotional strategy by to highlight DIA’s distinct internal teams.