Izuku: Toriel, I need some help
Toriel then walks over to the bathroom door
Toriel: What do you need, Izuku?
Izuku: do you have any clothes that fit me?
Toriel: Oh, well, I never expected someone of your size to arrive here, all of the people who have fallen into the underground were children
Izuku: That's... What!? You tell me children survive that fall?
Toriel: Surprisingly so
Izuku: wow, but back to my clothes question
Toriel: Right! You may be able to fit in my robes, Let me get one for you
Toriel walks to her room, gets one of her robes, and hand it to Izuku
Toriel: Here, try this on, I think it might fit
Izuku then opens a slit in the wall for Toriel to slide the robe in. Izuku wears the robe and walks out of the bathroom, thinking that the robes look a bit feminine. Walking over to the living room
Toriel: So, Izuku, how does the robe feel?
Izuku: It's comfortable, but it's kinda feminine
Toriel looks at Izuku and tears well from her eyes
Izuku then runs over to Toriel
Izuku: Toriel What happened?!
Toriel wipes the tears
Toriel: Nothing, Izuku, your long white hair, your stubble, the robe, it just reminds me of my son
Izuku: You have a son?
Toriel: I had a son and an adopted human
Izuku: Had?
Toriel: Yes, Chara died from buttercup poisoning, and Asriel took their soul to the surface world to bury their body but was... brutally murdered by humans, this is why I can't let you leave the ruins, Asgore will stop at nothing to get revenge against the surface world, he needs 7 souls to break the barrier, 6 children have died leaving the ruins
Izuku: Wow, that is some hardcore shit-
Toriel: Izuku, watch your language
Izuku: Right sorry, but there has to be a way to stop him, right?
Toriel: No, he's the strongest monster in the underground, no one was able to defeat him in battle, but that was a long time ago, I have no idea how much stronger he has gotten since then
Izuku: Then, there's no way for me to go home, is there?
Toriel: I'm sorry, Izuku, but this is your home now
Izuku: *sigh* No...
Toriel: no?
Izuku: I must try, there has to be a way to defeat him, I will stop at nothing, not even the laws of physics will stop me, I will reverse time if I have to
Toriel: If you really need to leave, you must defeat me first
Izuku: Toriel, don't make me do this
Toriel: When you are ready, come down the stairs
*time skip to the exit of the ruin*
Toriel: You're here
Izuku: We can settle this peacefully, there's no need to fight
Toriel: I need you to prove to me that you can fend for yourself
A battle is initiated between Toriel and Izuku
