In late 2015, MBK Entertainment removed their profile page from the official website and it was reported that the group was disbanded.
The second unit consisted of the original Co-Ed School male members Kangho, Kwanghaeng, Jungwoo, Taewoon, Noori and Sungmin.
[1] Core Contents Media also announced Superstar K3 contestant Shin Jongkook would replace Kangho.
[2] The group released a single album, Hommage to Lovely-Dovey, with the title track "Lovey Dovey-Plus" on February 14.
Near the end of 2012, the group was moved back to the main label Core Contents Media, along with F-ve Dolls.
Members Kwanghaeng and Noori left the group in September, and were replaced by Yuhwan and Taeha in October.
[11] In mid-2013, Core Contents Media stated in an interview that they had no plans for Co-Ed School to reform again as both of the sub-units had grown and changed their line-ups to become independent groups.
Taewoon also took charge in most of the writing, composing, and producing of the album, and the group gave a lot of direct input in their choreography.
One day later, Sejun also announced via social media that he left SPEED to pursue his acting career while still signed under MBK Entertainment.
In June 2016, Taeha made his solo debut as IONE, while Sungmin signed with Star Camp 202 to pursue his acting career.