TO1 have revealed their first group concept photo for 'UP2U.'

In the teaser image, the members continue the 'troublemaker' theme in handsome schoolboy-inspired styles. 'UP2U' is the boy group's upcoming 4th mini album, and it's set to drop on November 23 KST.

Check out TO1's latest 'UP2U' concept photo above, and stay tuned for updates on their comeback.