[No one's POV]
Kazuma, Aqua and Megumin were startled awake from a loud explosion that just suddenly. Aqua fell off her bed and frantically looked..

Aqua: Wha-wha???

Kazuma: What the Hell?!!

Kazuma turned to Megumin, who is up in her clothes and started pinching and pulling her cheeks...

Kazuma: You Idiot!! Why would you do that this late at Night?!!

Megumin: OWOWOWOWOW, IT WASN'T ME! IT WASN'T ME!! I SWEAR!!!

Kazuma: Then where did that explosion come from?!

Aqua: *looks outside* Uhh, Kazuma..*points outside* look out the window.

Kazuma lets go of the explosive shooting mage and outside. He saw y/n standing far from an older man with monsters. Many adventurers were on the ground hurt, while y/n stood his ground. Megumin also took a peek, setting y/n by himself with those unknown monsters and got worried..

Megumin: Why is y/n out there all alone?! He's gonna get killed!!

Aqua: Well..I wouldn't worry about him that much.

Megumin: Huh?

She then looked to see y/n with a weird belt-like device on his waist. He then took out a card from a contraption on his left hip..

Megumin: What is that in his hands?

Kazuma: I dont even know..

Megumin: Bu-

Y/n: Oboeteoke! Henshin! *slides the card into the driver*

[3rd Person POV]

Kamen Ride-

Y/n returned the driver to its original position as the Decade Symbol appeared in front of the driver.

-Decade-

Y/n was now transformed into Kamen Rider Decade, much to the young girl's surprise..

Megunin: *eyes glitter with surprise* Whoa!! What is he?? Hiw did he do that?! Shouldn't we help him?

Kazuma: I think y/n can take care of them. I know he can.

[Back to the fight]
Y/n..now transformed as Kamen Rider Decade charged forward at the Imagin and the evil rider. The Bat Imagin fired Sonic Blasts from its mouth, but Decade kept running at them slashing with his Ridebooker in sword-mode. He got close to the Bat Imagin and slashed at it, giving it some damage and making him screech in pain.

It took to the skies and fired another Sonic blast at him, but the barcoded rider dodged the attack and nearly got clawed by the Leo Imagin.

"Here..kitty, kitty, kitty" Decade Taunted

The Leo Imagin roared and tried to attack him with its morning star, which the ride dodge swiftly to the right and kicked it in the face, pushing it back..

"Bad touch." Decade spoke.

Something starter to glow and form on the rider's left wrist. It dimmed out to see what seems to be a card scanner.

A card shot out of the SHR Ridebooker and it showed to reveal a different variant of the Decade Bazooka..

*handmade by me*

He then scanned the card on the wrist device, as the card pixelated and grew until it fell into the Rider's hands.

*the bazooka deaogn belongs to SuperHeroTimeFan on Deviantart*

"Nice. And it's in a better design than that cardboard piece of crap." Decade spoke.

The rider was then pushed to the ground by the Leo and Whale Imagin(shot by it's Tailgun) and had to block a piercing claw attack from the leo.

"You are getting awfully close there, buddy. Let's blast you off, shall we?" He said

He then charged the Bazooka with energy, while kicking the Leo Imagin back. He got up and aimed the launcher at the Imagin and spoke:

So, Long!" Decade said.

As he pressed the trigger, a bright magenta/white ball of energy shot out of the muzzle and straight at the Leo, making the first one collide with the whale Imagin and they get caught in the blasts explosion, destroying them both. Decade took notice of the Bat Imagin still in the air and he took out another card before scanning it into the driver:

<Attack Ride: Blast!>

Decade shifts his Ridebooker into gun mode and shot at the Bat Imagin. It took some of the shots on the wings, damaging it and making it fly away from the pain.

"You won't escape from me." Decade said, as he took out a favorite card of his and scanned it.

<Attack Ride: Invisible>

Decade disappeared into thin air, while the Bat Imagin saw and felt comfort. Unfortunately for it, Many holographic human-sized Decade Cards started appearing and soaring in the air, all around the Imagin. The Imagin tried to fly away from them, but the cards followed pursuit from behind as a voice rang out:

*replace SkyRider with the Bat Imagin*

<Final Ataack Ride: D-D-D-DECADE!!>

The Bat Imagin looked back and screeched in terror as Decade's Kick landed onto it, destroying the Imagin on contact. Decade fell down to the ground and landed with a medium-sized crater below..

"That's one down. Who else wants to get blown up?" Decade retored

"Dammit! Doesn't matter I can finish you off now!" Gaoh attempted to slash but Decade easily dodged and transformed his Ride Booker into a sword.

He countered Gaoh's hit. Decade kicked Gaoh into the wall. Decade drew a Rider card from the book.

"I know they're only a one time usage right now but...Henshin!" Decade placed the card in the Driver and closed it.

<Kamen Ride: Den-O>

Gaoh watched as a tune was heard with Silver pixels exploded from the DecaDriver and collided with Decade transforming into Den-O's Plat Form. Next, red armor pieces flew around him. Then a metal red peach slid down his helmet as it stopped and split apart, becoming insect-like eyes. The armor fitted as the shoulder armor locked on first, then the red armor locked in the front with the yellow armor locked in the back.

Gaoh growled as y/n transformed into his sworn enemy, Kamen Rider Den-O SF. He then did Momotaros' signature pose.

D-Den-O SF took out his sword and started attacking. To Gaoh's surprise, he was almost fighting as the real Den-O. D-Den-O soon gave him a slash across the chest. The two Riders were soon led to the grasslands. D-Den-O dodged a slash that would've taken his head, and kicked Gaoh in the gut, before slashing him to the ground.

"Help me up, you idiot's!" Gaoh spoke

The remaining Imagin gathered up with the evil rider and

"Damn..you!" Gaoh spoke as he scanned his rider pass..

<Full Charge!>

Gaoh's Gaoglasher glowed with orange electrical energy, as Decade took notice of this and took out a Final Attack Ride card and scanned it..

<Final Attack Ride: D-D-D-DEN-O!>

Decade raised his sword up, as red
Electric energy was glowing on the blade tip. Both Gaoh and Decade glared at one another, as they charged at one another and clashed with one another.

"Grrr... this world will be devoured by King-Sama!!" Gaoh shouted, trying to push the rider back

''Sorry. But..the only rider that decides a world or dimensions fate.. is this guy" Decade pointed to himself.

Gaining the upper hand, Decade sweeps Gaoh by the feet and slashed him to his monster army, bringing him to the ground. Gaoh looked up, only to have Decade turn back to his normal form and used his regular Final Attack Card.

<Final Attack Ride: D-D-D-DECADE!>

Another ten holographic human sized cards appeared in front of Decade leading to Gaoh and the Imagin. With that, he then runs foward, phasing through each of the cards, until the final card and with the rider landing two Vertical slashes at Gaoh and the remaining Imagin..

Gaoh, severely damaged and knowing his upcoming doom looked up at Decade and uttered one last sentence..

"Lord shade will purge this world into Nothing. NOTHING!!"

Gaoh spoke, as he and the imagin glowed red before exploding into nothing. The flames quickly died out as a bright card was floating whereas Gaoh used to be.

[End of fight]
Decade then De-Henshined back into Y/n with the driver vanishing in thin air, as the young man stared at the floating object.

Y/n: What is that?

The card then flew directly at y/n and it nearly hit his face..if his sense didn't kick in and made him catch the card on time. From that, the Card's bright light dimmed down to reveal the same rider that he just defeated.

Y/n: Awesome. So, with each special rider i defeat..i gain their powers. Neat.

???: Thank you, young man!

Y/n looked up to see everyone cheering for him saving their lives. The injured Adventurers saw y/n's fight and cheered him on too. Luna came rushing forward and glomped the young man down to the ground in a tight hug, while nuzzling him.

Luna: Thank you! Thankyouthankyouthankyou.

Y/n: *smiles nervously* Anytime, Luna. Do you mind getting off me?

Luna: Oh! S-sorry. *quickly gets off*

Y/n: *gets up and dusts himself off* Let's just get you home, ok?

Luna: *looks bashful* Can you carry me?

Y/n: *runs chin* Hmm..okay.

Y/n wants toward the blonde woman and picks her up, princess style.

Y/n: Where to?

Luna: The building across the market.

Y/n: Ok.

The two went off to her home with people whistling at the two. Luna felt herself becoming red being held in his arms..

Luna: *thinking* Oh, my..his hands feel so firm.

Timeskip..

Luna and y/n reached her home building. Y/n gently set Luna down.

Y/n: Looks like this is your stop.

Luna: Yeah. *hugs me* Thank you you saving my life.

Y/n: Anytime. Couldn't risk having a beautiful woman like yourself being killed.

Luna: *eyes widen and her face turns red, whe hugging him tighter* Y-you think i'm beautiful?

Y/n: I'd be lying if a said i didn't. And aren't you clingy?

Luna: *realizes what she's doing and blushes* U-umm..s-sorry.

Y/n: It's alright. Inbetter get back to my friends. Stay safe! *starts to walk off*

Luna: *grabs him* Wait! J-just one thing before you go.

Y/n: *turns around* And what's th-

He was cut off, only to have his head grabbed, arms wrapping his neck and a pair of feminine lips pressed against his. She pressed him to sitting on a bench, and she sat on his lap fully kissing him and added tongue, still much to y/n's confusion. However, At first y/n was surprised, but his mind is telling him to go though with it and soon melted into it. A few second later, they parted with a string of saliva..

Luna: Wow..you a nice kisser.

Y/n: Well..to be perfectly honest, it was my first kiss.

She then got off me and stood up.

Luna: I'll see you at the Guild tomorrow.

Y/n: Trust me..I'll be there.

They separated and Luna walked to the building, not before y/n spanked her butt in a sexual way while smirking. She yelped in pleasure and giggled, before going inside.

Y/n: Heh. Aren't i lucky...

[Y/n's POV]
I headed back to the Hotel where Kazuma and the girls are residing in. Since Megumin joined, I upgraded our living space to four beds instead of two. I got into my room, only to be tackled by Megumin..

Megumin: HOWDIDYOUDOALLTHOSE MOVES?!AREYOUAWIZARDOFSOMETHING?!?

Y/n: *pushes her back a little* That's a little too close to me, Megumin.

Megumin: *smiles sheepishly* Sorry.

Kazuma: Dude, just how freaking powerful are you?

Y/n: That's for me to know..and for you to forever find out.

Aqua: You are a badass with those powers of yours. Because of that..I think you should be our party leader.

Y/n: Really? You think i should?

Aqua: Think about it. With our current stats, those monster would beats us three easily. And while your rider powers are truly superior.

Y/n: Ok. What about you, Megumin?

Megumin: I agree with you being a leader. You are the strongest out of all of us.

Y/n: *turns to the green jumpsuit swordsman* Kazuma?

Kazuma: I hate to admit it..but the girls are right. I think you should be leader.

Y/n: Well, if you guys truly want it, then I'll be the leader.

Aqua and Megumin: *jumps in the air in happiness* Yay!!

Y/n: Let's just go to sleep, ok?

I went into the bathroom and got changed into my pjs. After that, I got into my bed and was about to sleep..until I felt two pairs of arms wrap around me..

Y/n: *blinks twice* Umm..what are you guys doing?

Aqua: I wanna sleep next to you again.

Megumin: I..i wanna sleep next to y/n too.

Y/n: Well..i gu-

Girls: Yay! Now sleep! *drops down onto his chest and snores*

Y/n: *sweatdrops* Eh...

Kazuma: Hmph..lucky bastard. *goes to sleep*

Y/n: Well..a guess that life for a Harem protagonist.

I took a look at them, being cute in their sleep as I slowly drift to sleep.

[Dreamscape]
Y/n felt himself onto a cold floor and sprang awake instantly..

Y/n: WRAAHH!! COLD! COLD! wait..*looks around* Where the hell am i?

???: We're inside your mindscape.

That familar he heard shocked him. Next, a Dimensional Wall appeared in front of him and someone came out of it. Aa
Japanese man with short reddish hair, brown eyes, in a black/Magenta suit walked out. Y/n knew this man. His name was Tsukasa Kadoya, Aka, Kamen Rider Decade.

Y/n: Tsukasa Kadoya.

Tsukasa: Heh. Saves me the trouble of having to introduce myself. I'm assuming you have no idea what you here for?

Y/n: *nods sideways*

Tsukasa: Well, you might as well sit down..cause we'll be here for a while.

I'm gonna stop right here. I hope you guys like the chapter.