On February 7, 2011 5dolls released the music video for their debut single "Ipsul Jaguk" (입술자국 "Lip Stains"), which was produced by Brave Brothers.
On February 16 they released the MV for "Neo Mariya" (너 말이야 "Your Words") from their debut mini-album "Charming Five Dolls".
F-ve Dolls released their 2nd mini-album "Time To Play" on May 11, 2011 with the lead single "Like This Or That" (이러쿵 저러쿵) and its accompanying music video.
In early 2012 the group's male sub-unit SPEED debuted with the digital single Hommage To Lovey-Dovey.
Around mid-2013, a representative of Core Contents Media stated in an interview that they have no plans for Co-Ed School to promote as a full group as both of its sub-units had grown and changed their line-ups to become independent ensembles.