- sasha: armiiiin help me write my essaaaayyysss
- armin: ...weren't your essays due like two weeks ago?
- sasha: well, yes, but the teacher's really lenient about deadlines. pleaaaase you only have to do two of them; i'll buy you ice cream!
- armin: *sighs and snatches essay prompts away from sasha* i can't believe you sometimes.
So Underfell Sans (the grumpy, cold and agressive version) and the reader get out of the Underground. The night falls, and she convinces him to come with her, and she takes him to a really good spot to see the stars he have never seen before. He have a crush on her and maybe let the cold facade down for once. I don't know if it would make a great story, take liberties if it's too restrictive, but have fun writing this !You're talentend enough to make it works, anyway ! Take care of yourself <3