Eugene Record up with two members of another local group to form The Hi-Lites and eventually changing the name to The Chi-Lites. After a few unsuccessful singles, the group was signed by Brunswick production chief in Chicago, Carl Davies. Record wrote or co-wrote (often with singer Barbara Acklin) a long series of hits for the group, including million-sellers,"Have You Seen Her" and "Oh Girl", as well as major hits, such as "Homely Girl" and "Give More Power To The People". He also wrote and produced for other artists, mostly on Brunswick, including Acklin, Jackie Wilson, The Lost Generation, Otis Leavill, and later,
Closer (Oh My Girl EP) was produced by Yoo Sung-gyun of Sunny Visual, who also directed B1A4's "Solo Day" and "Sweet Girl". It has a fairy tale and fantasy-inspired theme, called "magical, sad and beautiful" by Yoonjung Yi of "BNT News". The dance choreography was created by Soulme to fit the song's theme. When viewed from above, the choreography forms the shapes of the astrological signs. This corresponds with Mimi's rap lyrics: "Out of all the constellations, I take the one that looks like you / And place it gently in the sky". On October 7, 2015, Oh My Girl held a comeback showcase at