The Rhyme Master- Sans x Reader

When Frisk freed the Monster from the Underground, humanity had difficulty accepting the Monsters back to their world. Many raged or rebelled about their sudden appearance, but thanks to those who wish for peace among two races, they were welcomed with open arms.
For example, like (Y/n), she's accepted them to her world; and has befriended sum of monsters. What if she has befriended the otaku scientist, and said scientist wanted her to meet her friends.
Things go out of hand!
How can everyone handle puns, when rhymes are now added!
As a certain Monster has predicted, "Two beings that shouldn't meet could cause a paradox. They must not meet!"
Hey, why can't puns and rhyme not meet?

(I do not own Undertale, I wish, it is rightfully owned by Toby Fox. I do own the story plot, future ocs.)