[You are Frisk]

Last night, you were invited to stay the night at Toriel's house, You had to lay with Chara since Asriel didn't have any sleeping bags and so Chara reluctantly lets you sleep with them, You and Chara lay down, You hugging them like a pillow, Chara then falls asleep with you, too, But in the morning, You feel something furry that you're hugging... It's Chara! They have somehow become a Boss Monster instead of the usual human they are... With some floppy ears and a snout, They also have two little horns sticking out their hair, They also have big paws replacing feet and hands, and they have pink paw pads on the paws... They also have a tiny small tail behind them. They are covered with fluffy white fur, too... You find yourself in shock and shake them awake in worryness, Soon they start to stir and they groan, finally speaking up

Over!Chara: "Ugh, my head. Frisk, why the hell did you wake me up?"

They notice your worried expression and the fact you are pointing at them so they look down at themselves, Their expression getting filled with shock

Over!Chara: "W-What the hell happened to me...?! Frisk, What the hell is going on?! What happened to you, too?!"

After panicking, you also look down at yourself and notice that the same thing has happened to you.