DAY 1: MEET MY TWIN?

A VARIETY SHOW WHERE THE SAME NUMBER OF GIRLGROUP MEET THE SAME NUMBER OF BOY GROUP
This variety show will appear two group from different entertainment.
They will looking for each other, stalk about each other and finally meet in a stage where they will perform what they got from stalking the other group!
we will also pair them with the same characteristic! CURIOUS?
THE FANDOM ALSO PARTICIPATE IN THE LAST DAY!!
let's read :)