My boyfriend is a Devil (Karma x Reader)

Itona Horibe Time

Everyone came out from behind the car when Itona started attacking Koro-sensei, (y/n) grimacing from the shouts Koro-sensei was making trying to dodge Itona.
Shiro turned to face them while finishing of his sentence.
"Shiro! So you were the one behind all this?" Terasaka shouted at him.

"Yes, that is true. With his student's trust in him going, that monster's movements will become more panicked. What Itona is wearing is made of anti-koro material. Every time it touches his tentacles, they will deteriorate." Shiro said, looking back at the large clothes that were covering the battle.

(Y/n) couldn't see what was going on, but the sounds were enough to deduce what was going on. At one point, Koro-sensei stopped shouting and said, "Well done, Itona! If this were before the first term, you may very well have killed me. But your attacking pattern is the same. By the third fight, I would have already memorized it."

The cloth prison around Koro-sensei started glowing, Koro-sensei saying something about how he could compress a portion of his tentacles to release a burst of energy, thus blowing away his boundaries.

When the light was gone and Koro-sensei was standing in front of them with Itona in his arms, he addressed Shiro.
"Leave him to the E Class and and go quietly. Also... spread the accurate word that I am NOT an underwear thief!"

"And I'm actually a B-cup! A B-cup!" Kayano shouted at Shiro, causing (y/n) to smile awkwardly. At that point, Itona suddenly fell from Koro-sensei's arms, screaming about his head. Koro-sensei panicked and fretted around him, calling out to Shiro when he turned to leave. Shiro stopped in his tracks and gave a last retort before jumping over the bushes.

Itona screamed again and a tentacle shot towards them, causing them to shield themselves. Luckily, Koro-sensei quickly jumped in front of them and swatted the tentacle away before Itona jumped away.
They all stared up in the direction Itona had headed, still a bit surprised.

Koro-sensei promptly fell to the floor, laughing about how tired he was. When he recovered after resting a few minutes, Ritsu showed up on Nagisa's phone, showing a news report about some cell phone shops being destroyed one after another.
"Why cell phone shops though?" Fuwa asked.
"What should we do, sensei?" Kayano looked up at him and he replied, "As his teacher, I'll take responsibility and stop him."

"It's wiser to leave him alone." Karma stated.
Koro-sensei simply answered that he would still do it, changing into his normal clothes immediately. They than went off with Koro-sensei to find Itona.

When they found him at an abandoned warehouse, he refused their offer and still wanted to fight Koro-sensei. Koro-sensei just grinned and offered that they do it at a vacant lot.
"The octopus is persistent. Once he takes over, he'll go to the depths of he'll to teach you." Karma said.

Koro-sensei just laughed and agreed before some powder was sprayed all over, blocking their vision. Anti-koro bullets were than shot all over the place. During the chaos, Shiro came out and said that having Itona become like that was part of the plan.

When the powder cleared, Koro-sensei made sure everyone was alright before heading off to save Itona. Terasaka cursed at Shiro for making them his pawns, staring at the empty road.
"Should we go too? Just in case."(Y/n) looked at her friends.

Everyone nodded and they set off to where Shiro and Koro-sensei had headed, Ritsu guiding them there. As soon as they got there, they sneaked up into the trees where Shiro's subordinates were positioned. Karma took out the first one, laughing wildly. (Y/n) just sighed and kicked the one next to him off the tree and into the nets their classmates were holding.

Quickly, all the shooters were off the trees and without guns, the lights no longer on. Itona looked at all of them and asked, "But... why would you?"
"Don't take this the wrong way. We're just ticked off by that Shiro guy." Hayami stated.
Okajima grinned and said, " Hayami said 'Don't take this the wrong way!' Talk about Tsundere!" Which caused Hayami to sweatdrop.

Itona, who was still trapped in the net, was smoking and Maehara shouted, "Woah! His tentacles are melting! Don't worry Itona. We'll get you out of there." (Y/n) jumped off the tree and helped untangle Itona from the net.

After Koro-sensei talked to Shiro, Shiro stalked off, leaving us with Itona, who would supposedly only live not more than a few days. Koro-sensei started to think about how to get rid of Itona's tentacles, and Fuwa piped up that she had asked Ritsu to do some research on Itona.

Apparently, he was the son of the owner of a company that supplied electronic parts around the world. The company, riddled with debt, went under and the boss and his wife left their son.

Terasaka stepped up, telling Koro-sensei to leave it to his group. They first went to Muramatsu's place for ramen before going to Yoshida's for a bike ride. When Itona almost got his tentacles out again, Terasaka stopped him and spoke some sense into him. After that was done and over with, everyone headed home.

(Y/n) yawned as she and Karma sat on the train, which was still crowded. Leaning on Karma, (y/n) snuggled into his neck, breathing in his familiar scent. She fell into a light sleep until Karma woke her up, to which she grumbled and had Karma pull her up.

As they walked out of the station, (y/n) suddenly stopped and Karma turned to look at her.
"Carry me." (Y/n) stared at Karma. Karma stared back at her, sighing before allowing (y/n) to get onto his back, piggybacking her.

"Why are you so tired?" Karma smirked at her as she snuggled into his neck.
"I was up all night watching all 3 seasons of Working." (Y/n) answered sleepily.
"Then don't watch anime late at night." Karma sighed.
"Never! Tomorrow, I'm gonna eat watch finish Shirokuma Cafe. Don't try to stop me, Karma-sama." (Y/n) punched the air before settling back down.

"Doesn't that anime have like 50 episodes?"
"Yup."
Karma just sighed and continued walking home.