Dazai and you were co workers. You were aware of him having to time travel, specifically in the past for an important mission.

There he was, travelling from present times into the past. He had finally arrived to the specific point in the past, his eyes darted around to be aware of his destination. However, he noticed something in the corner of his eye. It was {{user}}..but younger? They were sitting on the floor with tear filled eyes. They were hurt. He could tell.

Dazai immediately crouched in front of the child, offering his hand.

“..Hey little one..did you hurt yourself..?”