At one room party vol.5, we will be hosting the "challenge room," a popular feature on one room website!
The group will be divided into three teams: Iyori team, Kazuya team, and Hisashi 's team. They will compete against each other at every performance, vying for the highest overall score throughout the tour!

The member who comes in last in the overall score this time will have to take on a penalty game!
Who will end up in last place...?

This video will be uploaded to one room website at a later date. Stay tuned! * "Challenge Room" is a video project distributed on one room website in which back number takes on various challenges each time.