Oh My Girl – Cupid
They are from WM Entertainment (B1A4 is their labelmates) and I think it’s one of the best debut of a “standard cute” girl group since a long time.
From YT:
OMG DAY? Finally, the meaning of this unknown hashtag is revealed! The 8 girls from the picture will debut as “OH MY GIRL”. The next generation girl group OH MY GIRL has released an exotic teaser clip prior to revealing its team name. The video received much attention from music fans all over the world. The members include the “genius” girl SeungHee, HyoJung, JinE, Mimi, YooA, Jiho, Binnie, and Arin.
The title song “CUPID” is by the famous producer Shin Hyuk who also worked with the global pop star Justin Bieber. Shin’s team of composers “Joombas Music Factory” joined forces with Korea’s #1 lyricist Kim Ina for the production of “CUPID”. The main theme from the beginning of the song, combined with the members’ charming voices, is sure to give off the energy “OH MY GIRL” has.