In the early afternoon of a Wednesday. Frisk came back classes in the surface, and had lunch, again, a piece of pie, as usual as Toriel usually does.
Frisk never says anything, nor does anything of how tired they got of eating buttterscotch-cinnamon pie every day.
After lunch, Frisk was in their room, doing homework, and after a big while, they stopped, hesitated while getting up from sitting and looking where Toriel could be, and then closed the door. With the door of the bedroom closed, Frisk went to grab a cell phone very well hidden, their voidspshere phone, a "gift" of a someone.
Frisk used the phone to call someone, but it didn't got answered for quite a while. The call kept ringing, and Frisk waiting. After a big moment, the call hanged out for not been accepted, so Frisk hesitates if trying again or not, and after a deep breath, tries again. This time, after a moment of waiting, is picked up, but there are strange sounds, sounds Frisk couldn't recall of what are exactly are.
UltSans: "Hey, uhm... I'm kind of busy right now."
Then, a sudden cry is heard, is a mixed sound of a cry and of a yell, is very strange and surprises Frisk from how it sounded in such a sudden.
UltSans: "I'll go for you in a... moment... Hours as much, but for now, I have to hang up, see you later."
Then, the call is hanged up, but more strange cry yell sounds were heard before the call was hanged up. There were also other noises Frisk couldn't recall, nor knowing of what were exactly, but it was difficulty to hear the voice without being covered by the noises and those cry yells.
Frisk hesitated, but couldn't help themselves, so they did what they should, hide the phone and go back to do the homework, and wait for his arrival.
After an hour and 17 minutes, a glitchy portal suddenly opened in Frisk's bedroom. Frisk turned around while still sitting, and UltSans went through the portal.
UltSans: "Alright, what do you need?"
Frisk simply grabbed the homework, and showed it to him. He hesitated, observing, and then he sighed.
UltSans: "Alright, I'll help you. A good review in the subjects is always good tho..."
He walked, and took a seat aside Frisk, and started helping with the homework, mainly explaining to make Frisk do it on their own understanding what they were doing.
But while time passed, Frisk also let him know they were tired of Toriel taking care of them every day in the same way, it was very repetitive, boring, almost careless. The same routine, the same food, the same poor amount of attention...
He hesitated, now understanding... It wasn't about the homework in the first place...
UltSans: "... You should tell her. Talking is how problems get solved faster and easier, and how you get what to do faster than by ignoring."
After helping with the homework, and a good reflexion of what Frisk should do, suddenly, StoryFell Chara appeared through the portal.
StoryFell Chara: "Hey~, I prepared you something~. Or you come, or you lose it~"
And without any other word, StoryFell Chara went back through the portal. Both hesitated, and then looked at each other. He shredded his shoulders.
UltSans: "What? I have my needs, and... You should recognize... You know...[1]"
Frisk hesitated, and then turned to the homework done, and started reviewing it. He hesitated, slowly nodding multiple times.
UltSans: "Yeah... Is not for you to know... Well, see ya. And think about it, ok? Maybe she doesn't know other way to care. But if you never try, you'll never know. And remember this... If you can, you have to. So if you can change thing, you have to change things... You can talk with her, you have to talk with her."
Then, he went through the portal, and it closed behind him. Frisk hesitated, still looking at the homework while faking to review it.
[1] UltSans is talking about how hot StoryFell Chara is, but doesn't want to drop it like that. The stare of Frisk was making him uncomfortable, and he felt like guilty for taking so long for doing "that" with her while Frisk had to wait. A poor attempt to make Frisk understand.