The chapter below of our Control guide contains a walkthrough for a side mission called What a Mess: Take a Break.
To begin the mission, visit the board in Janitor's Office after performing all the previous tasks from the What a Mess questline.
Walkthrough: This is an epilogue to What a Mess questline. Go to the office - you'll receive the final task. Go... and relax on the couch. After resting, the quest will end, and you'll receive a reward - assistant janitor's outfit!