Most Underrated Rookie Group/s of 2015?

I don't know much about girl groups but with the boy groups, Romeo has got to be the most underrated. I don't know if this has already been talked about but I love their songs and the choreography for Target was hella awesome! They could rival Seventeen (this coming from a big fan of Seventeen) in terms of performance and appeal. They seem talented and promising but they aren't as well-recognized. Why is that? :(

Anyway, do you know other underrated rookie groups from last year?