ONIELy

oNiely (stylized oNIELy) is the first EP of Niel under TOP Media, released on February 16, 2015. The album is Niel's debut as a solo artist after over 4 years with the South Korean boy group Teen Top. Of the album's seven tracks, only "Affogato" was written by Niel.

==Background== On January 5, 2015, it was announced that Niel would be making his official solo debut in February. January 27, on Mnet's "4 Things Show", Niel revealed a self-composed track "Affogato" from the EP. On February 1, TOP Media announced Niel would release an EP entitled oNiely on February 16. Niel collaborated with various artists for his EP, such as C.A.P, L.Joe, and Dok2. February 17 on the radio program, "Power FM's 'Choi Hwa Jung's Power Time," Niel said he had to go to the emergency room twice during preparations for the debut due to anxiety. On February 20 in the TV show "2TV morning" Niel's mother sent a video message stating "I found out from the news article that Niel had gone to the emergency room."