Warning: [Au! Sans x Sans! Reader] Unknown to any other Sans, there lives a secret dimensional pocket timeline called Under (). (Y/N) is the Sans of that world while their younger brother (B/N) is the Papyrus. One day, a glitchy dimensional pocket appears and poor (B/N) falls through. (Y/N) must find a way to save her brother. Along the way they meet some...unexpected allies.

Love is weird. There is really no way to describe it. Its a connection you could hold with anyone, but only someone. Its a comfort to encourage and a blade to destroy. It can be with a super soldier, a god of mischief, a teenage boy with spider DNA, or even a former assassin. But wherever love leads you, an eventful life is sure to follow. (requests are open)

You find yourself at Grillby's thinking about a certain friend of yours hoping that he'd step through the door. Either by a cruel or amazing twist of fate, you end up staying the night over at Sans and Papyrus' house. It is then that the comical skeleton suggests that the two of you hang out because there's nothing better to do. Well, you agree. Undertale is Toby Fox's.

Y/N and Tony have always had trouble getting to sleep, even though both of them loved it. Tonight is especially difficult, since a thunderstorm is brewing outside and Y/N's irrational fear is starting to stir.