So why are they trapped in boxes!? That's rude. At least make them fit in one large box all together. Maybe add another AU in with them.
Fine Fine you have a point. See I would add a AU but it's up to you guys! My personal favorites are Underfell and Underswap or Swaptale or fuck it IDK.
Sans: What the-! Hey we're in a larger room! Still small but hey!
Frisk & Asriel: MOM!
Toriel: My children! Oh my sweet babies! *hugs them tight*
Papyrus: Sans! Frisk! Tiny Asgore!
Chara: ...
Toriel: What is that bite mark on your shoulder Frisk dear?
P: Yes! And why do you have your fangs out brother?
F: *Blushing crazy*
S: *slides deeper into his hoodie.*
T: Did you bite my Frisk!? SANS HOW COULD YOU!?
P: SANS OH MY GOD YOU BITE FRISK?! THAT'S WRONG AND INAPPROPRIATE!
S: The textbox told me to do it I swear!
F: Yea! He wasn't willing honest! *glares at Sans mouthing "You owe me"*
T: Fine just If anything happens like that again, *slides her clawed finger across her neck to Sans*
S: Yea! Of course Tori!
F: Sans this is the second time I've heard about an AU. What is it?
S: Nothing kid k.
You know what? You guys should get to have rooms that have doors. Sorta like a plain house. Boom! Sans and Frisk in one, Asriel and Chara in another and Toriel and Papyrus!
S: What was the point of that? We can just walk back to the central room if we want to. Come on Frisk.
F: Yeah that was kinda dumb.
Do you want me to put you all in separate rooms again with no escape so you can't see anyone else again?
Everyone: NO!
Exactly. Be thankful. So there are three smaller rooms and one big one. The room on the left is Sans and Frisk room. The one on the right is Toriel and Papyrus' room, and the one in north of the central room is Asriel and Chara's room! Hope that helped!