You'll admit that you're in a bit of a bad mood. First there was the disaster that was the dictionary and then, just as you were about to figure out something you wanted to actually do, you got interrupted. So, yes, you would really like this to be over as quick as possible so you can go back to your own business. First you check your magic sense and make sure you've got the location. It seems to be two floors down and deeper in the building.
Walking over to the door only door you can see on the roof, you try the handle. Locked. You snarl in annoyance and kick down the door, blasting it out of the doorframe and over some sort of railing. It seems you got lucky and the door lead to a stairwell, one made of concrete with metal railings. You can tell because you can hear the door making loud crashing noises on the way down. You can't be the only one who heard it either; it was loud as thunder. Now it seems you've got a second reason to move quickly, unless you want to deal with people harassing you for breaking their door.
You vault over the railing, letting yourself fall two floors before reaching out and grabbing the guardrail and flipping yourself over onto the landing, Trying the door out, you're pleased to find that it isn't locked as well. Going through it, you find a hallway with pale green walls and a white floor. There's the occasional metal thing along the walls or sign board but luckily there are no people there currently so no one sees you.
As you walk down the hall, some people do end up exiting various rooms and rushing past you to check what happened but none of them pay attention to you. Which is good because you're not sure what you would have done if someone tried to stop you. It's a bit of a walk to your destination but luckily your long stride eats up the distance and it isn't long before you've arrived at the door to one of the rooms in the building.
The door isn't closed properly, leaving it ajar. You gently push the door open enough to peek inside. You see a woman lying in a bed, surrounded by a variety of machinery, with a girl sitting on a chair next to the bed. The woman is clearly sick. Her skin is pale, she's sweating slightly, she's lost all her hair, but she's still smiling happily at the girl, who's chatting at her excitedly, waving one of those metal things people eat with about as she talks.
"… And then I made my wish and I got this cake, which was super delicious and I came to share it with you and that's what happened!" The girl finishes, setting her hands down in her lap, where you notice there's a plate with crumbs on it.
The woman reaches out and starts to weakly comb through the girls long, white hair with her fingers. The girl hums happily as the woman begins to talk. "That's quite a story. I'm glad you've seemed to have made a new friend. And I'm glad I got to share this cake with you." The woman stops stroking the girl's hair and rests her arm on the bed once more. The next time she speaks, she keeps having to stop and rest, like she's out of breath. "Nagisa… I want you to know that I'm proud of you… I know… you'll grow up to… be a strong, beautiful woman… I… love… y-" She doesn't finish her sentence.
"Mama?" The girl, Nagisa you now know, asks in a voice so low you can barely hear her. She takes her mother's hand gently and shakes it. "Mama? Are you awake? Please, wake up. Mama, wake up!" Her voice is rising now and her shaking is getting more violent. "Mama? MAMA!"
[] This isn't your problem. There's no reason to be here. Just walk away.
[] This isn't your problem. The girl is clearly the source of the magic you felt. Interrogate her.
[] … Comfort the girl?
... Awkward.