Snail pie isn't good.
I learned that on the second night I was with Toriel. A voice ran through my head that night-that fateful night that I decided to stay...it told me...to leave the ruins.
I didn't want to break my own heart leaving Toriel...soI didn't leave her. Don't judge me. I couldn't do it. I couldn't leave. After a fitful night of tossing and turning, I awaken to find the gateway to the rest of the Underground-and my freedom...destroyed.
I was stuck in the ruins forever.
The ruins really do get smaller and smaller the more you explore them. I know every corner now. I know I can never leave this prison. Don't get me wrong. Toriel is amazing and sweet... but I can't live in the ruins my whole life. It was selfish of Toriel to tell me to stay.
I wonder if I can ever find a way out. Maybe I can. Maybe I can... climb Mount Ebott. I sneak out of the house, grabbing a backpack full of my belongings. I cry. I clutch my hands around Toriel's journal. I took it...to remember her. "Goodbye, Toriel," I whisper. I turn around and leave the house for the last time. I run through the ruins, crying. I arrive where I landed... a year ago. The spot where the buttercups broke my fall into the mountain. I smile, wiping away tears. I kneel, sniffing a buttercup.
A voice sounds out from the ground beneath me.
"Stay determined."
I will. I will stay determined. I pick a flower and put it in my bag.
Goodbye, Toriel.
I get a foothold on a jagged rock, protruding from the wall. I climb like this the whole way up. It's a grueling climb. I find a place to rest, still not all the way up. I dig through my bag, searching for a sweater...I find a note...it's from Toriel.

Frisk,
I know you are planning to leave, and I am surprised you are.
I'm going to miss you. We would have had a good life together. You know I always wanted to be a teacher for you. I know you always wanted to go home, I'm happy if you are happy... so do what you want to do. I'll always be "bonley" without you though.
Remember me,
Toriel

I find a thick slice of Butterscotch Cinnamon pie enclosed.