Our Multiverse Adventure as Gokaigers

(Phew, I'm so glad they bought it. But my red coat got tore in the battle, I wonder if I can make a new one. More importantly the katana got broken, *sigh* I really don't want to talk to the crazy blacksmith.)

"Hey... Hey!"

"Oh Sorry, I was lost in thoughts." I said after coming back to my senses.

"No problem. So, I heard you killed one of the twelve moons. Then you must be pretty strong right?"

"Actually, I'm not that strong. In a 1v1 match I doubt I could defeat any of the Hashiras. And the demon was only lower moon 5."

"But you are stronger than a normal demon slayer, right?"

"Well, I guess so. By the way, Thanks for carrying me. Sorry I can't walk because of my leg."

" It's ok, just doing my job. The name's Nobi by the way."

"Mine's Ren. Ren Kosuke. Nice to meet cha." After walking for a couple of minutes we arrived at our destination.

"Perdon me! Is anybody here!" Nobi yelled out from the front door.

"Yes! Coming!" We heard sounds of footsteps coming from the back and the front door opens and we saw a young girl of slightly below average height with twin-tails wearing a standard Demon Slayer uniform with the addition of a white nurse dress on top of it.

"A Kakushi? He's hurt, right? Please follow me." She heads back into the mansion without waiting for us, we follow her and arrive to an empty room full of beds.

"Please put him here." she pointed to a bed near the entrance and after I got on the bed.

"I should get back to work. Get well soon." Nobi said and held out his hand.

"Yeah, I will." I said and shook Nobi's hand. He walked out of the room and closed the door on his way out.

"Please take off your clothes and stay still while I'm examining you." She asks after taking out a box of what I assume are medicines.

I took off my clothes and sit straight on the bed. She started examining me and after a while she mixed some medicines in a bow and mixed it with boiled water.

"Your muscles are torn, your left leg ankle is twisted, and have multiple cuts on your face and back. It seems like Kocho-sama already did first aids. Drink this medicine and get plenty of rest, in no time you'll be good to go. I'll check up on you every day and your medicine will be delivered by one of the girls working in the mansion. Is there anything you want to ask?"

"No, I'm good. Thank for the medicine... Oh! Can you tell me your name. Mine's Ren Kosuke but you can call me Ren."

"My name is Aoi Kanzaki. I work as a caretaker here. If you have anything you want, you can find and ask me." She gets up and walked toward the exit and looked back at me, nodded and went out.

I lie down on the bed, take a deep breath and closed my eyes.

(Man, I'm so tired. But starting from the moment I'm healthy, I am going to training my ass off. Even with those preparation it still wasn't enough. I need to become stronger than this and master Water and Thunder Breathing to get the super sentai power. For now, let's focus on getting better.)

3rd person POV

In a dark room lighted with lamps, the Hashiras and Kaguya Ubuyashiki before starting the annual meeting.

*knock* *knock*

"You may enter." said Kagaya Ubuyashiki. The door open as we see Obanai Iguro and Sanemi Shinazugawa enter the room.

"Pardon our intrusion Oyakata-sama." The two of them sat down on the tatami floor.

"We apologize for being late." The two bows their heads.

Kaguya: "No need, its ok. Now that Iguro and Sanemi is here, we can start the Hashira meeting. According to all of your reports, the demon activities have been steadily raising and the new demon slayers quality have been declining. What do you all think?"

Sanemi: "I suggest increasing the qualification to join the demon slayer. That way we can increase the strength of the demon slayer crops."

Gyomei: "But there's a problem with that solution. I'm afraid that if the requirements are too difficult, it might scare of newcomers. Unlike the previous era, those that have had their family massacred by demons and those that had been in the demon slayer corps for generations, not having the will and determination of a demon slayer is common."

Rengoku: "Asking innocent people to take up swords and fight and die for the demon slayer, I disapprove!"

Iguro: "Then we should retrain the new demon slayers untill they can keep up with at least one of us or else they are weak and useless."

Kaguya: "Then what do all of you think of Ren Kosuke? Rengoku, Shinobu, you two have met him in the past, yes?"

Rengoku: "I think he has potential. He defeated one of the twelve moons soon after joining all by himself even if it's a lower moon."

Tengen: "Oh please, I would've defeated the demon way faster and more flamboyant than him."

Shinobu: "Tengen-san please don't interrupt someone when their talking."

Tengen: "Tch"

Rengoku: "Anyway, as I was saying, I met him last year in a restaurant. I was eating when he walks up to me and asked me if I was a demon slayer. After I said yes, he asked me for some tip for the final selection. I asked if he was going to per take in the final selections, but he said he was going to train some more because he didn't feel like he was ready. He also bought me a bowl of ramen and after that we parted ways."

Shinobu: "As for me, I met him just before this year's final selection, so I guess it was after he met Rengoku-san. While I was returning to headquarter after I finish my mission, he surprise attacked me. So, I calmly asked him why he attacked me, and he answered, "I thought you were a demon." After that I challenged him to a match and he said, "How about we make it interesting." I asked him how and he replied, "If I win, I want you to go on a date with me."

Mitsuri: "WHAT!! HE ASKED YOU OUT ON A DATE!!… *cough* sorry, please continue."

Shinobu: "I said what if I win, he said, "Do whatever you want with me I guess." and

Mitsuri: "And! And!"

Shinobu: "and I agreed."

Mitsuri: "Kyaaa! She agreed."

Shinobu: *vein in her head* "Mitsuri-san can you please be quiet."

Mitsuri: "...sorry"

Shinobu: "After that, I naturally won of course. but then he shouted that he'll get stronger, defeat me and go on a date with me. Fufufufu he was quite cute. And it seems that he has gotten stronger than before."

Kaguya: "From what you've said he seems like a rather cautious but also straight forward individual."

Rengoku: "About that, I would like to ask him to be my Tsuguko."

Kaguya: "Are you sure Kyojuro. From the crow's report he uses water and thunder breathing. Isn't it normal for him to be Tomioka's Tsuguko."

Giyu: "It's fine Oyakata-sama. I don't mind. I have no interest in having a Tsuguko anyway."

Rengoku: "Very well. After this I'm going to ask him if he wants to become my Tsuguko and if he agrees that I'll take him under my wing. And even if he doesn't use flame breathing, he has potential that I want to polish."

Kaguya: "Then is there anything else that you all would like to say.... then I declare this meeting over."

1 person POV

The next morning

*Yawn* (My body is really stiff and hungry. I wonder what's for breakfast.)

Just then the door opened and came in three little girls holding a tray of dumplings and some tea. They came toward the table beside my bed, put the tray on the table and turned toward me.

"Um...um you... your breakfast and medicine." Said one of the girls meekly pushing the tray toward me. I smiled gently at them and said.

"Thank you for bring me my breakfast and medicine. You three are very kind. May I have the pleasure knowing your names."

The girls brighten up and they introduce one by one from left to right.

"My name is Sumi Nakahara." "I am Naho Takada." "I am Kiyo Terauchi."

"I see. And My Name is Ren Kosuke, but you can call me Ren. May I call you Sumi-chan, Naho-chan, Kiyo-chan?"

They nodded and then the door opened as Kyojuro walks into the room.

"Hi. Good morning, Ren. I'll cut to the chase; do you want to become my Tsuguko? I will take you under my wing and protect you as my junior." He says while giving a thumbs up.

"But are you sure Rengoku-san? After all I use water and thunder breathing, not flame breathing."

"Hahaha Not a problem! I don't care if you don't use my breathing. I want to train and guide you to release your full potential."

"Then if you don't mind, I would be honor to be your Tsuguko. After I recovered that is."

"UMU. Then I'm heading out to do my mission and I'll come back here after you've fully recovered. For now, I must get going." said Rengoku as he walks out the door and leaves in a joyful manner.

(Yes! I have the chance to study under one of the strongest demon slayers. Allright, I'm gonna try to get better really soon.)

And for the next two weeks my everyday life consists of me waking up and eating breakfast after talking with the girls and Aoi regularly check up on me in the afternoons just sleeping all day.

Today, Shinobu came to the room and greeted me with a smile.

"Hello there, looks like your leg has heal up."

"Yeah, looks like I can move again."

"Then why don't we start the Recovery Training. Please follow me." she said and walked ahead of me. I follow Shinobu into a wide room and saw the three girls standing near a futon, and a table of multiple teacups.

"Let me explain it to you Ren-san. First you lie on the bed and those girls will massage your stiff body, second is reflex training. The teacups are filled with medicated tea."

"You and I will try to snatch the teacups and splash the other with tea. If you hold down the teacup before I can lift up, I can't move the cup. And the final one is whole body training. It's basically tag."

"Wait, I'm going up against you? But aren't you like one of the strongest demon slayers."

"Frankly speaking, we don't have any one on your level that can take you on but don't worry I'll make it easy for you. Are there any more questions... no? Then let's start." Shinobu said and walk toward the table full of teacups and sat down.

"Ren-san Please come this way!" shouted the three girls from across the hall while waving their hands enthusiastically. I walk toward them and lie down on the bed.

The three girls immediately pinned down my legs and twisted my whole body.

I felt intense pain spared across my body and yelled out.

"AGHhhh! It hurt!"

"R...Ren-san, are you ok?" asked one of the three girls and stopped twisting my body.

"n...no problem, I'm fine. You just surprised me that's all." I lied not wanting them to worry about me.

"Oh! Then we'll start again ok. Ready... go!" They started twisting, pulling and bending my whole body.

(Fuck! It hurts so bad, but I have to endure it. Come on! Be a man and toughen it out!)

After what feels like hours, we finally finished the massage. I'm kneeling on the ground out of exhaustion. I slowly walk toward Shinobu's direction and managed to reach her without falling down because of my pain.

"Fufufufu. Now that your done with the warm-up, Let's start..."

Before she could finish, I quickly went toward the teacup in front of me, but she reacted faster than me, putting her hand above mine and splash my face.

"Ara, did you think that could surprise me. Well, if that was enough then I wouldn't be a Hashira you know. Shall we try again?" she said while smiling with her eyes closed.

"Again." I say angry at her and this time I used my thunder breathing to speed up my movements.

*smack* *splash* *smack* *splash* *whoosh* *splash*

(We battled all afternoon and I'm cover in tea, but I didn't manage to splash her even once.)

"Oh my, it's already evening. I think that's enough for today. Your strength's still not enough, you'll have to try harder than that. But I'm sure you're going to get stronger. After all, didn't you swear you would go on a date with me."

My face heats up and a blush appeared on my cheek. (She heard that! That's soo embarrassing.)

"Fufufu. Well then, goodbye for now see you tomorrow." She says, gets up and disappeared.

(*ahem* Since she's gone and there's nothing for me to do. let's train Total Concentration Breathing: Constant for now. With the training I did with Urokodaki-san, I can only hold it for 3 hours at max.) I get up from the floor and exit the mansion into the courtyard and saw Sumi, Naho and Kiyo hanging the blankets.

"Sumi-chan! Naho-chan! Kiyo-chan! Can I ask you for something?" I called out and waved to them.

"Ah! It's Ren-san. Sure, what do you want to ask. If it's within our abilities, then we can do it."

"It's not much, I wanted to ask for some tough rope and gourds to train."

"We can do that. Please wait a moment Ren-san." The three of them then ran off into the mansion and after a while that came out carrying some ropes and multiple gourds.

"Here you go Ren-san."

"Thank you very much. Sorry to take up your time"

"No. No. It's no problem. We love helping" The three of them nodded at me and then went back to do their work.

(All right! Let's Do this!)

Fuuuuuu

*boom* boom* *boom*

I managed to blow up most of the gourds but still couldn't keep up Total Concentration Breathing: Constant pass 3 hours and after that I climbed a tall tree and tied my foot to the largest and steadiest tree branches and started doing crunches hanging from the tree.

After 20 minutes I untie the rope and fell down, but I twisted my body in midair to soften my landing. Then I started doing hand stands to increase my upper body strength.

For the next 10 days, in the morning I ran around in the forest behind the mansion, in the afternoon I help Aoi and the girls do some work around the mansion. After that I battle with Shinobu until evening.

At night I usually do push-ups, handstands and high knee until I'm tired and rest by doing meditation. And finally, I asked the girls for help to hit me with a bat if I stopped using Total Concentration Breathing when I'm asleep.

"Today is the day I finally break you after so many sleepless nights!" I yelled at the huge gourd, picked it up and inhaled as much as air as I can.

Suuuuuu

"Go for it!" "You can do it!" "Try your best!" The girl shouted words of encouragements.

Fuuuuuuuu

Crack...

BOOM

"Yes! I broke it! Take that you piece of S..." I quickly stopped myself from swearing in front of the girls. They tilted their head in confusion.

"Ahem, Nothing. Anyway, now it's time to take the big boss down!"

"Yeah!" all of them raise their fists excitedly.