You worked in the ADA, and you were used to Kunikida being a workaholic, constantly trying to get work done that Dazai was too lazy to do

He seemed stressed out sometimes, but he seemed to handle it pretty well overall

One night, after you were all dismissed for the day, you realized you forgot something in your office, so late at night, maybe around 10:30, you head back to the building to grab your stuff

Once you unlock it, you see kunikida in the main office, lots of papers scattered in front of him. He’s writing with one hand, his head in his other, clearly about to break down. He’s overworking himself again.