K-Pop boy band FTISLAND will be releasing their fifth album, “5…..GO,” in Japan tomorrow.

The title song, “Primavera,” was written by vocal Lee Hongki and was produced by popular Japanese rock band ONE OK ROCK’s vocalist Taka.

ONE OK ROCK has performed many times in Korea and has a strong fan base as well. Taka has also helped produce another song called, “My Birthday” as well.

Fans were pleasantly surprised at the different music style for their new title track.

“I was originally expecting something rock form Hongki and Taka’s collaboration,” wrote user 1passingby1 posted on the “Primavera” music video on YouTube three weeks ago. “Instead we got something really sweet.”

Others who don’t usually listen to the band also listened to their new album after hearing about the collaboration with Taka.

“I don’t listen to FTISLAND, but I will listen to their new Japanese album since they worked with Taka,” wrote user Karmie Nakajima on the video as well.

Other members of the band also participated in the making of the album and gained much attention from fans.

This album also celebrates their fifth anniversary since debuting in Japan back in 2010.

They will also begin their fifth anniversary arena tour in Japan starting in Tokyo on May 27. They will continue until July and finish at the Kanagawa Yokohama Arena on July 20.

This album will release four different versions tomorrow.