Fans are looking forward to a new concept from boy band U-KISS with "Mono Scandal."

The group has been around for several years, but has experienced a lot of changes since 2008. The recently released teaser for their latest song "Mono Scandal" shows that, once again, U-KISS has changed its style and member line-up.

The teaser video for "Mono Scandal" received a 19+ rating due to the sexy concept. The U-KISS members are seen getting extremely close with a female dancer in a way that's sure to make many fans jealous.

The teaser features a Latin-inspired guitar melody that shows how U-KISS is maturing from its typical dance sounds, but there is still a percussion beat that reflects U-KISS's ever-changing style.

The group's teaser image also hinted to the sexy concept, showing the members in black and white with simple button down shirts and jeans that showed off their sculpted bodies.

This is also the first time that fans are seeing the newest member, Jun.

Fans were a bit shocked last year when Dongho pulled out of the group, due to health reasons, and even more shocked when U-KISS announced that Jun will be joining the group to make up for the loss. This is U-KISS's fourth member to join the group- Kiseop, AJ, and Hoon also joined the group due to line-up changes.

AJ is on hiatus studying at Columbia University in New York City, so he won't be promoting "Mono Scandal" with the group. The rest of the members, Kevin, Hoon, Eli, Kiseop, and Soohyun will all be promoting as usual.

Fans who saw the music video on Youtube couldn't resist pointing out that the video is rated 19+, even though Jun is only 17 years old. However, due to Korean age being different from international age, Jun is considered to be 19 in South Korea.

The "Mono Scandal" mini album will be released on June 2.