Two Flames Together (Rin Okumura x Fem! Reader)

Her Start

3rd Person POV
Y/n walks around in the rain and looks for shelter. With no home, she had suffered through years of the weather's wrath. 'Just find some shelter! Don't lose hope!' She thinks to herself while keeping her spirit up. Finally finding something to hide under, she finds a large cardboard box, looks around to see if anyone owns it, and takes shelter inside the warm box. She hears footsteps approaching and looks outside the box, and she sees a raven haired kid, about the same age as her, with bright blue eyes. Next to him was a man who had orange glasses and looked fairly normal. 'Don't let them see me! If they see me and choose to intervene I'll waste their time!' The worried girl finally sees the two leave, not before the kid looks back at her. 'I think they left. Good thing they didn't notice me!' She thinks and smiles. It's not as if she was scared to interact with people, it's just her overwhelming strength and demon blood in her veins that makes her think nobody would like her. Soon, she'd learn to control her unruly blue flames. As if it was the knowledge she was born with, she had been a survivor of the blue night. Somehow she inherited Satan's blue flames and was treated as an outcast. Her parents had kicked her out and left her homeless to take care of herself. None of it bothered her though, because if she had to not be around to make the others happy, she would do it.
~ten years later~
Y/n POV
'It's finally time! I'm going to the one and only cram school at True Cross and becoming an exorcist! I've learned to control my curse and keep it under wraps with my demon sword, Kimikara. As long as I don't unsheathe the sword, I'll be fine and human looking! I'll just have to keep Kimikara to myself. I still haven't found a home all these years until Mephisto told me to live in a dorm building with two others. It really doesn't matter to me, I've always wanted a home! And now I've finally got one! And maybe I can be friends with my roommates as well! I should start walking to the school.
~time skip~
Woah! This place is huge! And I'm going to school here! It's like a dream come true! No matter what, I'll be an exorcist and help people! And I think I know which classroom I'm in. As I wander across the hallways, I just begin to realize how heavy my book is. Since it doesn't fit in my bag, I decided I would just carry it but jeez, this is heavy. Focused on the weight of my book, I trip over my shoe and fall face first to the floor. I wince and say "Ouch, I should be more careful." I look up and see a raven haired boy staring at me with a red tint on his cheeks. "Uh, are you okay?" He asks while looking away. "Don't worry about me, I'm fine! And I really should be going now! Bye!" Walking to the classroom that had been assigned to me, I slowly open the door. It's the raven haired boy again! What a coincidence! I keep running into him! I scan the classroom before taking a seat. There's some student who has two toned hair and looks like a delinquent but I won't judge a book by it's cover, a pink haired boy who was oddly staring at me with sparkles in his eyes, a kid who had a buzz cut and red glasses, a girl with purplish black hair, a girl with brown hair, a boy with light brown hair and a puppet in hand, and... is that a boy or a girl? They're wearing a dark hoodie and covering their face. I have this gut feeling it's a girl though. I sat down next to the raven haired boy and he looked like a mix of mad and confused. He was death staring our teacher like he wanted to kill him. "Yukio? What the hell are you doing here?" But he straight up ignored him. "Talk to me Yukio!" I should stay out of this. This is their problem, not mine. I'm sure they can solve it on their own. "Class can you please leave the room for a minute? I need to speak with this student here." He said calmly. Alright then. The whole class except the raven haired boy exited the classroom and stayed silent the whole time outside the classroom. From the outside, all you could hear was shouting, gunshots, growling, and more gunshots. Out of context, this situation sounds really bad. Walking back inside the classroom, we see some things have taken damage. "So uh, what happened just now?" The boy with the buzz cut asks. "Oh nothing serious!" The teacher shrugs off. "Anyways, now that that's over with, you can call me Mr. Okumura. Nice to meet you all."
~time skip~
Y/n POV
Since it's break time, I decided to just sit down and relax in the grass outside of the classroom. I hear footsteps approaching me and look to see who is running to me. It's the pink haired boy! Once he finally makes it up to me, he takes a deep breath and catches his breath. I can tell he's been running a while. "Hi I'm Shima and I was wondering if you had a boyfriend, Because if you don't I would be happy to be yours." He says flirty and hands me a flower. I just stared at him with not a single emotion in my eyes. "Thanks I guess?" I'm confused what he was trying to do. "Ugh, you're so weird Shima. Sorry about him, he's a real weirdo sometimes." The kid with the buzz cut adds. "It's really no problem, thank you!" And he walks off, dragging Shima with him. ~time skip~
Y/n POV
Now that school is over, I should head to the dorm building and meet who I'll be living with. I'm really excited! As I walk up to the building where Mephisto told me to go, I realize how huge it is compared to what I'm used to. Ok then, time to go in. This is my first time entering a home in years. I can barely remember what my parents' house was like. And I don't need to. I walk in and see the raven haired boy- again! "So you must be the third roommate Mephisto was talking about!" He said with a smile in his face.
Rin POV
Are you kidding me? The third roommate is a girl? And she's cute? This has got to be a dream! "So what's your name?" She asks me with a sweet smile on her face. "Rin. Rin Okumura." (I KNOW YALL HEARD HIM SAY THAT WHEN READING IT) "Hi Rin! I'm y/n, y/n L/n!" She called me by my first name already? Wow, she's just wow! But she'd probably go for Yukio before even laying her eyes on me. He's always been kind of  a ladies man. Yukio walks in. Speak of the devil (pun intended).
Y/n POV
Another boy walks in which I presume to be the other roommate. And he's the teacher from earlier! That's pretty cool. "So, you're the third roommate Mephisto was talking about right?" He asks me. "Yep, that's me!" I answer. "Then I'll show you your bedroom, alright?" "Sounds good to me!" I follow the boy with glasses but before I exit the room I smile at the other one. "So here it is! You will be sleeping in this room here, and if you need help with anything, I'll be in the living room." And he left. Ok then. The money I saved up from my part time job will finally be used to decorate this room.
Rin POV
She smiled at me! I can't believe it! She smiled! At me! It was so adorable I can't stand it!
Yukio POV
I walk back into the living room and see Rin rolling around on the couch giggling and blushing. "What... the hell.. is wrong with you?" I ask him, concerned for his mental health. "Hehe just fine!" He giggles. What is up with him? I've never seen him act this way before. "Heheh!" He giggles again. Should I call a therapist?