What changed?

Beginning (chapter 1)

Today was your first day at Karasuno high school you were super excited to see and
experience high school life. You are new to Japan meaning you still had a lot to learn about Japanese culture and language. You've visited Japan ones in a while since it was a beautiful place to spend time with family so you learned the basic Japan words and manners.
*****
"y/n hurry up your gonna be late to school"     your mom screamed from the living room

"I'm coming!" You said as you checked yourself out in the mirror making sure you look neat

"I won't be home till midnight, could you please make dinner and leave it on the table for me when I get home please" your mom said

"Yea mom" you said as you ran downstairs

"Thanks, now have a nice day sweetie be careful and enjoy your first day if school" she said as she kissed you on the forehead an walked to her car

"You too mom be careful I'll be waiting for you!
You said waving goodbye to your mom
******
You made sure to lock all the doors before driving to school as you got to the school and walked to the main office everyone was giving weird looks making you feel uncomfortable as you made it to the office you bumped into a group of girls
****
Girl1: watch it!
Girl2: haha it's a foreign she probably doesn't understand us....pathetic
You: I do understand and you were the ones who bumped into me so you watch it
Girl1: ballsyyy I see
Girl2: haha we'll have fun just wait
*****
As the two girls went passed you, you got a weird feeling that something bad was about to happen but you ignored it.
You went to the office to get your schedule and went straight to your home room as you got there people were still giving you weird looks but again you ignored it. Once you reached your home you noticed the two girls from earlier they smirk at you as you walked pass them and asked the guy near the window if someone was sitting on the desk infront of him

"n-no, no ones sitting there" he said as he looked at you confused and he asked

"Are you new, to Japan?"

"Well not really I've visited before but I'm still learning you know the language and culture" you said as you sat down infront of him

"May I ask what's your name" he asked

"Y-y/n" you said nervously

"Ooo nice to meet you y/n I'm Tobio ka-" he got cut off as the two girl from earlier slammed their hands on the table

Girl1: she's already causing trouble on the first dayyy look here this (she said as she hugged the guy that you were talking to) this is my man he's off limits that's one, TWO that's my seat so move it new girl

"He just said that one sits here" you said

"You don't, only reason why you don't sit here it's because you can't behave yourself" the guy said as he removed the girls arms from around him and slightly pushing her away

Girl1: kageyama how could you! Are you defending her right now?!? She pushed me in the morning she's not as nice as she looks

Kageyama looked over to you and then back at the girl giving her a scary look

"Are you sure or are you just trying to make her look bad? I thought we talked about this" he said giving the girl a scary look