BTOB dropped their pre-release "Someday" earlier today, landing on the #1 spot on several music charts!

"Someday" came in at #1 on various real-time music charts including Soribada, Naver, Mnet, Bugs, Genie, and more.

SEE ALSO: [PHOTOS] BTOB express enthusiasm about finally meeting fans through 'Our Dream' fan concert tour

"Someday" is a song composed and written by member Hyunsik, who is BTOB's 'father of music'. It's the boys' signature emotional ballad, with the rap line members writing their own rap lyrics.

The full 'Feel'eM' mini album will be released March 6.