Katsuki Bakugo x Reader

[Y/N] is a girl with a density quirk that allows her to alter the density of any part of her body to create powerful impacts, partially phase through objects, or allow things to phase through certain parts of her body. She is enrolled in class 1A at UA. Desperate to become a great hero like her parents who died saving her in a car crash years ago, she trains hard and mostly sticks to herself in class. Typically considered one of the weaker ones in her class due to her poor rankings in the sports festival and numerous defeats during training, she vows to work harder and master her quirk. She teaches herself new techniques and strategies during lunch breaks and late at night. After utilizing a new move she was working on during a training match against Bakugo, she brings him down and shocks the whole class. The explosive boy can't help but confront her and question her sudden improvement. Where will this confrontation lead the two teens? Will they become rivals or something more?
(Warning: some mature content - will be warned each chapter if containing mature content)