Blue Excorist and BHNA Crossover.

~....Beginning....~

-So, Rin and Yukio were separated at birth. Rin doesn't know that he has a twin brother.-

"Hey! Rin! Where are you?!" Bakuogu said Run and Bakuogu were playing hide and seek in the forest. Unfortunately, Bakuogu could not find him.

---A Few Minutes Later. Bakuogu spots Rin!---

"Ha! I found you-....? What is this?" Bakuogu said but he got cut off by the sight in front of him. Rin was looking at it too "What do you think it is?" Rin said to Bakuogu "I... I don't know? Doesn't it look like a gate to something?. I think we should stay away from it and ask your dad about it.." Bakuogu said backing away from it.

Rin shook his head

"No! I wanna go in and check it out!" Rin said "No. I don't think so. How about this! When were older like... 16! Then we can go! Because we're just 10 right now. We don't have much experience with fighting! And were still training. So until we get stronger and older we can not go through this gate looking thing yet!" Bakuogu said. Rin knew what Bakugu said was the right choice but he still wanted to go in there. "And...! I win! I found you!" Bakuogu was grinning. "Awe man! I am a seeker this time! You have 10 seconds!" Rin said "What?! That's not fair!?" Bakuogu said "Fine! I will give you 15 seconds! Time is ticking!!" Rin said, "Fuck! You!" Bakuogu said running and sticking out his tongue. "I might do that when we're older..~!" Rin said being playful Bakuogu stopped in his tracks flustered and faced Rin "Stop doing that!" Bakuogu said "Doing what?" Rin said trying not to smirk at Bakuogu's face "You know what! You better give me more time to hide!" Bakuogu said "Yeah Yeah!" Rin said

-- 6 Years Later...... Bakuogu and Rin we're finally 16... --

"Where are you guys going?" Satan said with Reaper following behind him. "Oh, Hey Dad! Me and Katsuki we're going to the fate we find when we were little!" Rin said "Gate..? Gate..!! What did it look like?" Reaper said "... Dad? It had weird skulls and... A weird aura? It also had huge eyes, Dark colors, Just very weird..."

(Sorry, I Can't describe that well.)

"I don't think you guys should go there..-" Satan said but he got cut off by Rin "Sorry dad! No can do! I am taking Katsuki with me if you don't mind!" Rin said while running then jumping through the sky while holding Katsuki in a bridal way. "Don't worry! We will be fine!" Bakuogu said completely letting Rin hold him like this.

---Once Rin and Katsuki reach there destination...---

"Okay, We're here.. Can you let me down now?" Bakuogu said "Nah, I'm fine. Let's go through the gate now." Rin said smirking Bakuogu was blushing a bit and sighed peacefully letting Rin carry him.

---When Rin and Bakuogu went through the portal---

When they were going down they felt like there were on clouds, ☁️ Rin is holding  Bakuogu tight so he won't fall. About 30 seconds later Rin and Bakuogu finally reach their destination.

When they finally got down there it was nothing they expected, they saw figures? It kinda looked like them... It was very weird...

"Hey, Rin I think these creatures are called Humans... Let's go somewhere... So we can plan something out.." Bakuogu said to Rin... Still on Rin's arms. "What!? Come on! Let's explore! " Rin said "No, Rin, We are in a whole different world. We are going to have to hide.." Katsuki said sternly. Rin sighed "Fine... But you have to promise that we will explore this world someday... " Rin said sounding a little sad "Good. Can you let me down now?" Bakuogu said sounding a little hopeful. "Nah, I'm good," Rin said chuckling

Soon they found a cave to stay in for now... Fortunately, when they were looking for a place, They came across a school called "University of Academics." Rin being the way he is wanted to go inside there Bakuogu finally gave up and said that they can go tomorrow.

"Let's sleep okay? We can go to school tomorrow." Bakuogu said Rin nodded and they both went to sleep.

---The Next Day..---

Bakuogu was already awake, he liked the light coming from the sun in this world.. There was rarely any light or sun in their world. A few minutes after Rin woke up seeing Bakuogu admiring the sky. Rin thought he looked beautiful and just smiled.

A few seconds later Bakuogu finally notices that Rin was staring at him. "Are you done staring at me now?" Bakuogu said laughing a bit "No, I'm not, Actually I want to look at you some more.." Rin said Bakuogu's face was a rose pink 'W-Whatever, Dumbass! Let's go to that school you wanted to see yesterday! Make sure you hide that tail of yours" Bakuogu said a bit flustered.

Once, Rin finished hiding his tail, he got up and stood by Bakuogu.

"Come on, Katsuki! Let's go!  Check out the school!" Rin said  "Alright Alright fine..! " Bakuogu said.

Rin picked up Bakuogu and carried him a bridal way. Not long after they reached their destination, they didn't want to go through the front door so, they got through the window. They came across a door which said   "1A" They went through the (Rin is STILL carrying Bakuogu) door without putting any thinking into it.

"Who are you, and why are you here." A tall, black-haired guy said who also looked tired.

Rin put Bakuogu down.

"Uh... Sorry for intruding. You can say that we're from a different world...? We got lost and decided to come here.." Bakuogu said, "And you expect us to believe that?" A guy with red and white hair said "Uh. Yeah? Dumbass" Bakuogu said "We don't allow swearing in our classroom. So please stop." A guy with blue hair and glasses "BITCH! Who said that you could boss me around!" Rin forgot that he had bad temper issues. "Please calm your friend down. I don't get paid enough to deal with this." The black-haired looking tired guy said and it's true most teachers don't get paid enough for all of this. "Pup. Please calm down were going to get kicked out" Rin said while patting his head "I am not a pet..~" He slowly fell into Rin's arms sleeping client and peacefully "Woah! Is that how you get him to calm down?!" A guy with red hair said he looked cool "Uh, yeah. He gets pissed off easily- Sorry about that.." Rin said while looking at the blue-haired boy with the glasses "It's fine. Just try to refrain from doing it." The guy with the glasses said "So, is what the other guy said true? About being from another world?" A green-haired guy said. He looked like 🥦 Broccoli."Uh, yeah? We just found a gate and decided to go through it..! Pretty fun!" Rin said, "So, you went through it with our thinking about what might have happened afterward?" The red and white hair kid said "Yup, pretty much!" Rin said

After when Rin said that Bakuogu started to wake, all the girls were squealing because they thought that he was adorable.

Bakuogu was yawning; not knowing that everybody was watching him. "Ngh. What happened?" Bakuogu said with a soft voice.

A few seconds later Bakuogu still didn't know what was happening. Another minute later Bakuogu finally realized what he was doing and snapped out of it flustered...

Bakuogu quickly got out of Rin's arms very flustered.

"S-So. Do you guys believe us?" Bakuogu said still kinda flustered. "No... I don't think so... Your story just seems so not real?" Ashido said  "So? What are your guy's quirks?" Sero said. "Quirks? What are quirks?" Rin and Bakuogu said at the same time. "You know.. Superpowers that you're born with?" Sero with a bit of confusion "I guess mine is... Explosions?" Bakuogu said with a spark of explosions coming from his palms. "And.  Mine is a blue fire! But I can't use it because I don't have control over it right now.." Rin said having flashbacks of when he was burning through hundreds of forests when he was little "hehe... " Rin also said.

"So... The son of Satan and the son of the Reaper is here eh? I would like to see how the story turns out... And what kind of twists and tricks I can pull...~"

This is just an idea- ٩(ര̀ᴗര́)ᵇʸᵉ!

(Bakugou has another power... I want it for the story-)

And Yes- Bakuogu and Rin found out about sex... When they were 10 years... They saw things... 😅😦