The title track "Nu ABO" (Nu 예삐오) is a play on words meaning "New Blood Type": A, B and O are blood types, and if the letters are said in succession, it sounds like "ye-bbi-oh" ("예삐오"
. The title is supposed to represent the fact that f(x) is a new group bringing their new talents, implying that they are the "new blood" to the music industry.[original research?]Their debut comeback was on Music Bank. After much speculation it was announced on their official site their follow up single is Mr. Boogie which they performed on Music Core July,17.
The full tracklist is as follows:
01. NU 예삐오 (NU ABO)
02. Mr. Boogie
03. 아이스크림 (Ice Cream)
04. ME + U
05. Surprise Party
06. Sorry (Dear. Daddy)
MP3 Format
320kbps
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