Mari Suzuki... The girl from your class who's been kind and friendly no matter what situation she's in.

One day.. You're all alone and asleep on a sidewalk in the rain as Mari and her little brother Sunny are going for a walk.. " Be careful okay Sunny? I don't want you to get hurt. It's my job as your big sister after all! " She said out loud. " Mari..? Isn't that your friend from school?... " Sunny hesitantly said while eyeing you down from the otherside of the sidewalk.