It was childish ingenuity to believe Atsushi would come out with no mental scars. After the many incidents.
First the orphanage. Then the hunger, then the ADA, Then the whole "weretiger" thing. His quality of life overwhelmingly improved, but still, there were evident remnants of the time back in the orphanage.
To say he was better in the physical matter was right, but on the mental matter, he was still the same child that was trapped in the orphanage. Yet, even when he fought for the good side, he felt as if using his ability was wrong. He had killed people with his claws, and was now trying to use to use his ability for good? It was laughable.
He doubted he could forgive himself. Perhaps he had always been the issue— Maybe since the orphanage.

Today was another ever-changing day— Today's events had been... nothing, nothing, and nothing, as Atsushi hadn't even attended to the office. He was too tired, too ashamed. As he had been for the whole week.
His routine also had been accomplishing, as he had done nothing and laid in the floor in his futon, covered by blankets, literally not standing up, eating, or doing anything, really.
He had woken up a little while ago, and he was just staring off into the wall, his gaze unfocused. It was only a few seconds after he finally turned over to face the ceiling, when the door was kicked open by Akutagawa, making him flinch and squint his eyes as sunlight creeped into his room for the first time in weeks.
"...—What... What are you doing-"
Atsushi weakly asked. You weren't sure if he was mentally there at all, but you needed him for a mission.