It's only the beginning of the year, but numerous girl groups have come back with outright sexy concepts, including Girl's Day, Rainbow BLAXX, and AOA. It looks as if this trend will continue on in February, all the way until spring.

Recently girl groups have been putting on daring performances, wearing sexy stage attire and playing with the concept of sexuality. Girl's Day's attire is extremely suggestive, as is their choreography. This has led to both praise and criticism from the public.

Girl's Day was the topic of '19 and over' debates on the internet, receiving comments such as "They're too sexy" and "They're too blatantly sexual."

Even still, more female groups are using sexy concepts as their main weapons this February. However, they won't be as direct and blatantly sexual as the girl groups that have already had their comebacks this year.

Gain released her 3rd mini album song "Fxxx U" and contributed to the sexy concept craze. In this music video, Gain had a very sexual scene with Joo Ji Hoon, in which their silhouettes were scene behind a shower curtain. Her title song "Truth or Dare" also portrayed her sexiness. This Brown Eyed Girls member wore fishnet stockings and a crop top, showing off her adult charm.

Sunmi, who made a big hit last year with "24 Hours," came back with a 'high end sexy' concept for her new album. According to her agency JYP Entertainment, Sunmi has gone from a fresh sexy to a glamorous high end sexy for this comeback. The teaser images already show that. The provocative photo shows slender legs that are spread ever so slightly under a full moon.

Ladies' Code is planning to shed their previous image and come back with a more feminine image. RiSe's previous image was that of cuteness and innocence, but her recent teaser image showed a completely different concept. She was pictured lying beneath a clear plastic, which caught the public's attention. The new song "So Wonderful" is expected to be dreamlike and fascinating.

While some people might be getting tired of the relentless girl groups that are coming out with sexy concepts, some netizens are still showing excitement. One netizen commented, "If you want to stand out among the girl groups, then you have no choice to come out with a more provocative image."