Sans x Frisk the last experiment no 2398 failed.. they create a monster but... is that he the true monster or somebody else?

Life is great in the Underground, until tragedy strikes... Will Frisk be able to save Sans, or is he truly gone... This is a really bad description, I'm sorry!!! This contains Sans x Frisk, so if you don't like that ship, I suggest not reading this. The first few chapters are also really bad, so if you're looking into reading this, please consider reading a few chapters!! 💙