4minute --the cooler than cool K-pop group best known Stateside for the solo career of star member HyunA-- made an unexpected return today with a new song called Cold Rain--and it's a ballad!

The fivesome's signature has always been club-friendly electro tunes or genre-bending pop ditties from Korean hitmakers like Shinsadong Tiger and Brave Brothers, so Cold Rain marks the first time that they've ever tackled the ballad genre.

And surprisingly enough, it actually suits them quite well.

The melancholy production (courtesy of Son Young Jin and Jo Sung Ho, who recently produced Davichi's Sorry I'm Happy) is just as gorgeous as it is gloomy. The group also gets a real opportunity to showcase their singing for once, with each member having a uniquely different style, from spine-tingling high notes to gentle rapping.

For those of you that aren't feeling the whole ballad direction, don't worry: 4minute will be back early next month with a proper pop single.

Check out Cold Rain below.

SM Entertainment's new girl group Red Velvet are already off to a huge start, with their debut single "Happiness" debuting at an impressive No. 9 on this week's Gaon chart.

To put this into perspective, SM Entertainment's last new group, EXO, only reached No. 86 with their first single, "History." Outside of SM, Red Velvet is actually the highest-charting rookie group of 2014 so far.

Elsewhere on the chart, SISTAR's "Touch My Body" slips to second place after a 2-week reign at the top to make way for San E's "Body Language," which rockets in at No. 1.

Block B's "Her" is down to No. 3, followed by HyunA's "Red" at No. 4, and Girl's Day's "Darling" which rounds out the top five at No. 5.

Park Boram debuts at No. 11 with "Beautiful," but she should rise even higher next week judging by her current performance on real-time digital charts like Melon.

On the other hand, Ladies' Code's "Kiss Kiss" debuts at No. 59, but unlike Park Boram's song, it probably won't climb any higher next week; as of this posting, it's already almost out of Melon's top 100. This will actually mark the first real flop for the group, who have been on a winning streak since launching last year with "Bad Girl."

A few spots down is Brown Eyed Girls' "Hush" at No. 62, followed by Hwayobi's "Closer" at No. 66.

Check out this week's new K-pop hits, below.

No. 1. San E - Body Language

No. 9. Red Velvet - Happiness

No. 11. Park Boram - Beautiful

No. 59. Ladies' Code - Kiss Kiss

No. 62. Brown Eyed Girls - Hush