★| fallen down?

You've fallen off a large cliff after wandering into a cave. You fell into this..wide hole. That hole took you to the Underground. A place you thought was just in the past. People in schools stopped teaching about it at this point..

Wandering around, this kind lady took you in after this odd, yellow flower tried to kill you. Her name was Toriel after a while of staying with her.

After leaving the ruins, you came across these.. skeletons..

This was odd, wasn't it?

(I don't feel like adding the description for Toriel, so you just passed her already)