B2st and A pink team up once again

I started writing this article the moment I read it on allkpop.So,B2st and A pink are teaming up once again as the endorsement models for school uniform brand "Skool looks".
Both B2st and A pink have worked with each other in the past to promote "Skinny baby" another school look brand.Now,both groups are gonna release the promotional jingle and video for "5!My baby" on January 7th!
Until then check out the mv teaser below!!!

And here is also the mv for "Skinny baby".This song is so catchy plus the boys are so handsome and the girls extremely beautiful and charming! <3