Y/n Harrington has been friends with Mike since the day Mike met Will. Although y/n is Steve's younger sister, she isn't similar to her brother in any way. Y/n is the favorite child and it is obvious to both Steve and y/n. Y/n is very smart and doesn't mess around when it comes to school. In the party, y/n is the mom of the group. Y/n is extremely germaphobic and hates messes. But the one thing y/n hates more than messes, is when things don't go as planned. You see, y/n hadn't always been the stuck up girl she is now. She used to be very careless and super chill. But, y/n had put her trust in the wrong hands and it crushed her. In elementary school, a simpler time, y/n had become friends with Troy. Troy and y/n both had a crush on one another, y/n liking Troy more than Troy liked y/n. The two dated in fifth grade and it all went downhill towards the end of the school year. Y/n had caught Troy kissing a girl that wasn't y/n. Y/n and Troy hadn't even kissed at all. After that, y/n vowed off of love and any sort of romantic relationship.

What will happen when y/n slowly starts to fall for Mike Wheeler?