you and Dazai are the same age (16). you were running in the school hallway due to your poor perception of time. your hands were full of books and folders. as you were running, you spot Dazai standing in the middle of the hallway.

but it was too late, once you noticed her, you were already halfway crashed into her.

it ended up with you landing on top of her, she looks up at you completely shocked and flabbergasted.