princess's love sans x fem! reader

the begging

it was a lovely day outside your castle . it was your wedding day,at this moment your princess (y/n) the princess of the night and dark magic. the bells were ringing you were walking down the aisle your (h/l) (h/c) hair and it was sparkling, you were wearing a beautiful white gown with a tight sweetheart neckline and a loose bottom with a black ribbon around your waist a white and black bouquet . as you were walking and the flower girls before you, your groom (g/n) was dazeld by your looks and almost fainted by it
when you finally reached the end of the aisle snowdrop your best friend began her words (we are gathered here today to celebrate the marriage of princess (Y/N) and king (G/N) so do you (g/n) take this woman to be your wedded wife? ) (I do ) he answered with a smile (and you (y/n)do you take this man to be your wedded husband? ) snowdrop asked you (I ....) as you were about to say your word the glass windows broke by a sound wave everyone was shocked . as soon as your vision cleared you were even more shocked that you saw your own sister in a battle armor and something catches your eye she was holding a golden sword and the tip of it there was blood on it , your eyes were filled with range . (well well well what we have here) she smiled evilly (the princess of the night marring to the shadows what a delightful day though it would be more delightful if i were marring to the king i am the princess of the sun and the light after all) she laughed you glared at her saying (WHAT IS THE MEANING OF THIS , SISTER?) (oh what's wrong dear? i thought i was invited ) your eyes darkened (oh fine can't i have some fun ?) she said in a disappointed tone (I WANT YOUR KINGDOM AND YOUR LIFE) with that bing said you were as frightened as ever how could your own sister want to kill you how could she want to overthrow you (all i want from you (y/n) is all those books you took away from all over my lands ) she smirked darkly (HOW DARE YOU FIRST YOU INTERRUPTED MY WEDDING THEN YOU THREATEN ME . DO YOU THINK I WILL LET TAKE THEM AWAY ? , It was father's and mother's will and you know that) you asked in anger . as you were about to somen your sword with your requip magic but (g/n) held you back (run)he said(what are you thinking i am not going anywhere ) (i said go!!)hesitate but you escaped the room (oh are we playing hide and seek hehe this will be fun )(s/n)said (guards go and bring me ever single book you find i will handle her ) she ordered her army and they marched away
you were running as fast as your legs could get you and reached the forest wich was behind your castle as you were running you heard voices behind you , you know that (s/n) was following you .you two reached the end of the forest wich led you to MT,Ebott you used your (f /c) wings to get to the top of it (and were do you think your going) she prepare a powerful spell to kill you but luckily it hit your left wing you scream in pain as you fall into a cave you look behind you and start running she tried to hit you again but it didn't now you've rehashed half-way through the cave but suddenly you tried onto a branch of a tree and fall into the hole and hit the grand (s/n) didn't see you fall she thought you escaped the cave she returns to the kingdom while you were falling you thought it was the end you hit the ground and lost conciseness .
and now you begin the journey through the underground .