After dying suddenly while gaming, Gu Yu transmigrated to a parallel universe and discovered that he had landed in the world of Undertale. Then Undertale launched to great fanfare, and he became the only player who knew the game's story.
Toriel: "The Underground is too dangerous. You should stay in the Ruins."
Sans: "Gu Yu, I just came up with another bad joke."
Papyrus: "I came up with a new pasta recipe. Human, come try it!"
