Chapter 6
Cw: #bkdk, a/b/o, A!Kacchan, PH!Kacchan, O!Dk, QL!Dk, mated!bkdk, light angst, time traveling quirk, insecure!Dk, older-future!Kacchan, soft!Kacchan, fluff!
Title: I come from the future
Based on Kurt's song "Vengo del futuro"
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It has been ten days since Kacchan left for a long one month rescue mission in Europe. His precise explosions were the most appropriate for such task.
Izuku is so in love with the blond, he has been ever since they were kids. Their story was full of ups and downs until it reached a beautiful plateau where both were in the same wavelength of feelings and finally accepted that they were each other's true mate.
Katsuki is such a caring alpha, always doing his best to take care of his Omega, scenting him affectionately and providing whatever he needs. He even left many scented clothes and items around the house, so Izuku didn't have withdrawals from being far away from his alpha.
Still... Izuku couldn't help it but miss him. His burnt caramel scent was all over their home, but Deku craved to be embraced by those big, bulky and safe arms. To sleep on top of his alpha's wide and soft chest, lulling himself to dream by hearing Katsuki's heartbeats. To wake up to the heavenly smell of breakfast and surprise his alpha by hugging him from behind, earning pleased croons from his man.
Sometimes... All of this seemed to good to be true. Izuku, despite being one of the most talented engineers in the Japanese hero support field, was still... quirkless.
The greenette was aware that there were many omegas that desired what he had.
Kacchan's love and devotion.
A sudden streak of possessiveness invaded him.
Mine, his Omega growled.
Izuku wished he could videocall Katsuki or at least hear his voice but that was out of the plans considering that no communication was possible due to the destruction of most of the city where the mission was taking place.
That certainly saddened the omega. He wasn't even hungry but he promised Kacchan that he would take care of himself in his absence. Thus, he ate a light dinner, brushed his teeth and went right away to the comfort of his nest that was located on their den.
The greenette was falling asleep when he heard a very characteristic and colorful voice.
"Fucking shitty couch, my damn pinky!! That's why I got rid of you despite Deku adoring you!!! Not that he has to know the truth," the hulk of a man cursed while holding his toe.
Izuku quickly scanned him.
Grumpy face: check
Blond spiky ashen hair: check
Heavenly tits, sorry, 'pecs': check
Burning caramel scent: check
His mating mark: check
But... this person was taller than his mate and somehow emanated a more... mature air. That's why he was holding for dear life the grenades that Kacchan had created for him in case a villain dared to mess with Dynamight's mate.
Those devices stored 30x times more sweat than the ones Katsuki had on his hero belt and could easily destroy the whole penthouse. That's why Izuku had his orange power field shield surrounding him as protection. That shit could withstand an earthquake.
"K-Kacchan?" Izuku asked, anxiously.
However, it seems that Katsuki's doppelgänger had already detected him first from his distressed omegan scent.
"Holy shit, you are so tiny and adorable as hell," the ‘clone?' snickered with dilated pupils, approaching Izuku but halting immediately when he realized what Deku had on his hands.
"D-Don't come near me!!! I-I don't know what you did to look like Kacchan b-but you won't deceive me!!!" Deku stated with fear and determination all the same.
"F-Fuck babe, please put those down, I know you don't want to destroy our home," 'fake Kacchan' expressed in panic.
"T-Then how do you explain this??? You appear in my living room at the late hours of the night and expect me to believe that you don't have bad intentions???" Izuku told him, matter-of-factly.
"Damn, look, I know this will sound crazy, but I'm your Kacchan from ten years in the future, okay?" the man confessed.
"W-What? No way! H-How? T-Tell me something only Kacchan would know!!!” Izuku demanded.
"I got transported here by a kid's quirk. The effect will probably last a few hours. In regards to your other question... You have heart-shaped freckle in your right ass cheek. It's my damn favourite and I always bite it whenever we fu..." 'future' Kacchan was saying but was abruptly interrupted by a very flustered Izuku.
"Okaaaaay, okay, s-stop, that's en..." the greenette was babbling before Katsuki cut in.
"Despite being mated you still want us to get married. If I'm in the period of time I think it is, then you have already bought the golden ring with an emerald that has engraved the date when you are going to propose on the inside along with our initials. You are planning to do so in three months, in the top of..." Katsuki was explaining.
"...Musutafu mountain under the starry sky," both spoke in unison.
"Wow," Izuku sighed heavily. He deactivated his shield and put the threatening grenades on a safe place.
"Now with that clear, could you tell me why shitty younger self isn't here taking care of you? The whole house has your distressed scent all over!!!" older Kacchan hissed in irritation, grabbing Izuku and scenting him thoroughly.
Deku melted.
His knees felt weak and the blond took him to the devil's couch, sat down and placed the purring omega on his lap. Izuku nuzzled into the other's neck scent gland.
"That's how I like it" future Katsuki whispered fondly as he inhaled deeply the rainforest scent of the greenette.
"Ah!!!" Izuku suddenly raised his head and accidentally bumped on Katsuki's nose now that he was out of his daze.
"Ugh!!!" the blond complained.
"O-Oh no!! I'm, I'm sorry Kacchan!!! Deku apologized nervously.
"S' okay 'Zuku," the blond responded, rubbing his hurt nose.
"I-It's just that... I wanted to ask some questions," Deku replied, barely audible and with a lowered gaze.
Future Katsuki lifted Izuku's face gently.
"Shoot, babe," he motivated him.
Deku blushed.
"D-Did you accept my proposal?" Izuku questioned this version of Kacchan without thinking.
Katsuki opened his mouth and Izuku instantly covered it.
"No, no, no, shit, wait, don't answer that, w-what if my timeline is affected by this, what if..." the freckled omega panicked.
He felt the blond smiling against his palm.
Future Kacchan engulfed Deku's hands with his own and started to pepper tiny kisses all over them.
"No repercussions will come out of this. You'll forget everything once I'm gone," Katsuki told him. "Now, what kind of stupid question was that? Of fucking course I accepted!!! I'd be the biggest idiot if I didn't!!!" he rattled, offended.
"B-Because... Because Kacchan is... so amazing. I'm completely out of his league. He is currently working in a big rescue mission at Europe. What if... What if he meets someone else and f-forgets about me?" Izuku whimpered.
Future Katsuki cradled his freckled cheeks and observed him right in the eyes.
"Now I remember that fucking mission. Listen to me, Izuku," Katsuki uttered with a clear tone.
"Younger me is currently doing his damndest to finish that task as fast as possible to come back to you. He doesn't think of anyone else but you. He wears the red scarf you scented for him even when he is on duty. He dreams of holding you every night, you, just you and no one else. He misses you deeply and can't wait to see you again".
"B-But, w-why, I..." Izuku attempted to interject but Katsuki beat him to it.
"No, Deku. Hear me out," Future Kacchan demanded.
"You are the most beautiful thing that has ever happened to me and my younger self. In the future, even ten years from today, we are still together, and I'll make sure to keep us that way until we become old and gray," future Katsuki continued.
Izuku was already sobbing.
"Every single effort we've put into our relationship has been worth it... And you still look spectacular," the blond told him with adoring eyes. "The youngest one has that characteristic sparkle that only your eyes have. She is already learning how to walk," future Kacchan sighed happily. "Her lovely smile takes over my whole life."
"T-The youngest? Then you mean that we...?" Izuku wondered in excitement.
"We have three," Katsuki revealed smugly.
"WHAT!??" Izuku's heart raced with loud thumps. The air was permeated with happy omegan pheromones.
"I'm the luckiest bastard in the whole world," Katsuki laughed.
Out of nowhere, he was starting to fade as Izuku was engulfed by exhaustion.
"It's seems my time's up," Katsuki whispered and kissed Deku's forehead.
"W-Wait, don't go, I still want to know if...," Izuku yawned. His mind was reeling with thousands of questions.
"Everything will be okay, babe. I'll make sure of that. Trust me. Don't be scared. I'll always take care of each one of your steps and walk beside you. No matter how many years pass. I'll still love you. You own my whole heart," future Katsuki promised, laying his omega on the couch and covering him with a fluffy blanket. Before completely being teleported back, he managed to place a tender kiss on Izuku's flat belly.
"See you in the future, Toshi," the blond smiled.
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Izuku felt soft caresses on his face. His eyes fluttered and opened completely to unveil gorgeous shining emeralds.
The greenette gasped soundly.
"Kacchan!!!" Deku cried and throwed himself towards his alpha, who hugged him tightly.
"Fuck!!!! I missed you 'Zuku!!! You have no idea!!!" Katsuki admitted frankly, inhaling deeply his omega's comforting scent.
"H-How??!!! Y-You were supposed to come back twenty days later??!" Izuku inquired.
"As if you didn't know that I'd do anything to have you in my arms," Katsuki captured his lips avidly, devouring them as much as he could after being apart for these unbearable ten days.
"S-So you overworked yourself??!!! Kacchan, wait, mmmphh, aren't you hurt?" Izuku checked him out thoroughly in worry.
Katsuki lowered him back to the couch and bit his cheek.
"Ow!!! Kacchaaaan," Deku protested.
"I'm 'kay, nerd. Now we sleep," the blond claimed, cuddling his omega and basking in his warmth. The blond tangled the red scarf that Deku knitted and scented around them. The one gift that helped him survive without his lover's presence and consoled him for more than a week.
But it wasn't enough. The scarf was losing Deku's scent and Katsuki's Alpha, and himself, were going insane. They needed their mate.
Thus, Katsuki worked efficiently and quickly to come back home to Izuku's arms, where he belongs.
Izuku, surprisingly, was sleepy once again. He doesn't even recall how he ended up on the couch. Oh, well. Maybe he sleepwalked?
"Goodnight, Kacchan. Love you," Deku beamed and kissed the blond's nose.
"Night, babe. I love you too," Katsuki gave him a sweet peck and closed his eyes.
‘We are complete now,’ his Alpha stated, and he agreed.
They were going to be fine.