You are a resident of Hometown, you go to the local High School every weekday, you do pretty well in class, though you weren't the most thrilled with School. You didn't have many friends, but you were fine keeping to yourself.
One early morning, you got to school, already bored out of your mind, you went into your classroom, sat at your desk, and from that point on, you were completely disconnected from what was happening, metaphorically, of course.
After hours of not doing anything, you finally got out of class. Normally, you would go home, but most of the way out the door, something got your attention, movement, in the kindergarten classroom, all the students had gone home, it was probably the teacher, Ms. Toriel Dreemurr.
You snuck over to the door of the classroom, despite nobody else being around, you peered through the window, she was putting away some science equipment that the children were using.
You gently open the door, planning on scaring her, not even thinking about the consequences of doing so. You snuck behind her, and made a loud noise, causing her to jump, and spill the science stuff on the floor, making the two of you pass out.
You woke up, on the floor, you felt strange, taller... You looked at your body... You.. were in Toriel's body. You were now an anthropomorphic Nubian Goat monster, with white fur and paws on the end of your fuzzy limbs. You now have a small tuft of fur on the top of your head, You were wearing the outfit she had on, which consists of an iris long-sleeve jacket, a black blouse, and a polka-dot skirt. You now also wear a heart pendant and color matching glasses.
You sat up, dazed and confused, what had happened?? Were you stuck like this?? Your old body woke up, with Toriel inside of it, like you, she started to freak out a little.
Toriel: "M-my child?? What has happened?? Why am I.. in your body?? Why are you in mine??"