A bird that refuses to leave its cage

you're Y/N a college student studying to become a biologist, you were adopted by the age of five, and got a brother by ten.

While everyone loves flying, you choose not too, you are also very reluctant on showing your wings, it's a gift you'd rather not have.
they remind you too much of a freedom and life you never had, even though you had a completely normal life, you never had a horrible past, or been bullied too much, you have a happy life!
or atleast as you allow yourself to have, you always felt unworthy of those happy moments.
you're happy! or atleast that's what you make your friends and family believe.
you can't help but feel that everything is worthless to try, but why?
your brother got most of the attention, but you allowed it, you've always given him more than what he deserves.
your relationship with him...... is difficult, but you still love him none the less!

one day you bump into a boy named Frisk, he reminds you of your brother in a positive way, they were the the same Frisk that freed those monsters from the underground, and soon enough, they introduced you to their friends.

they seem like nice monsters, besides a select few.
Chara, flowey, and Sans.

Chara and Flowey always seem off, while Sans sees right through your "I'm happy" mask
and that, makes your skin crawl.
soon enough your single mother had to go on a business trip, leaving you and your brother alone.

let's see how this plays out.

a/n
this is a birdtale fanfiction
more explicitly a Sansxreader :p
this is my second Sansxreader book, (go check my other one out)
in this story I'm hoping for it to be a HEAVY slow burn
so if you want something long then tada!
and excuse my grammar I'm not Shakespeare.
cover by me!
go check out my Instagram, I mostly draw my Au and ocs
enjoy!