Somehow, everyone survived...but not this guy.

He was killed by this guy.

He got into a short fight with Class-A Hero, and disciple of Atomic Samurai, Iaian.

From being interrupted by the S-Class, he took on this form.

(Atomic Samurai)"You're from space? So you came here with your friends in that toy in the sky?"

(Bang)"Atomic Samurai, we'll lend you a hand."

(Metal Bat)"Ya f*cker did this to my city?"

(???)"Fufufu, even if I did, what are you going to do about it?"

(HP Prisoner)"This is for all the men you killed!"

With every punch he threw, he remembered what Sea King told him.

(Sea King)"...Throw each punch with the intention to kill..."

Meanwhile

Kaito had already boarded the ship without anyone noticing. He was now confronting one of the generals, Gloryverse.

(Gloryverse)"You did well coming this far, intruder! But this is where you die! My acid breath will melt yo-"

He was immediately vaporized with a smaller Kaito Cannon.

(Kaito)"Hmm, Victim of Reality? All of City-A is dead, right?"

(VoR)"Yep, only the S-Class Heroes and Doppio remain."

Kaito went into his pink form, and made an impossible smile.

(Kaito)"Well, no reason to hold back then. LET'S CUT LOOSE!!!"

He summoned hundreds of Kaito Cannons, and they swarmed around the ship, blowing holes everywhere on it. He rushed inside, and killed hundreds of aliens he came across. He could then hear someone's voice.

(???)"Attention, intruder. Please stop destroying our ship, and leave immediately!"

(Kaito)"Want me to leave? I would if I could."

(???)"Oh. Alright, go up those stairs to your right."

(Kaito)"Ok...IM GONNA GO LEFT!"

(???)"WAIT! NO- NO- NONONONONO! THAT'S NOT THE WAY!!!"

Kaito blew a huge door wide open, where he was met with a cyclops.

(???)"I didn't expect you to get here so quickly. Welcome to my ship."

(Kaito)"So you're the one who's in charge. You blew up City-A, that's not a good thing."

(???)"Hey."

There was a giant, featureless creature behind him.

Using telekinesis, he threw four stones at Kaito, which didn't do too much damage.

(Kaito)"That's not very nice."

(Geryuganshoop)"You destroyed our ship! The universe's number 1 telekinetic...I Geryuganshoop, will reduce you to mincemeat!"

He did this.

(Geryuganshoop)"I did it!"

(Kaito)"No...no ya didn't."

One of Kaito's eyes glew red, and he fired a laser threw his head.

(Boros)"My minions were ants to you...splendid! Before we fight, let me introduce myself. I am the leader of the Dark Matter Thieves, ruler of the universe, Boros."

(Kaito)"I'm Kaito. I don't know what you want, but I can't let what you did go unpunished."

(Boros)"What I want? 20 years ago, a prophet told me that there was a being that's as strong as me."

Before he could finish his story, Kaito punched him into a wall, shattering his armor.

(Kaito)"WILL YOU PEOPLE STOP WITH THESE BACKSTORIES!?!"

(Boros)"The armor that held my uncontrollable power...has been broken..."

(Kaito)"...Whateves."

He then took on this form.

They threw eachother around the ship, blowing entire chunks out of it. During the fight, Kaito literally bit off one of Boros' arms.

(Boros)"Impressive, but it means nothing."

He regenerated his arm.

(Boros)"I can regenerate my wounds, but the damage on you will only stack until you di-"

(Kaito)"Shut up."

(Boros)"What?"

(Kaito)"I honestly don't give a damn about what you can do. Are you done playing around yet?"

(Boros)"...No."

His body now became white, with black markings on him.

(Boros)"Not yet."

He charged at Kaito, punching a section out of his face, and kicking him into space. He landed on the moon.

(Kaito)"Hmm...didn't expect that."

He looked around at the moon rocks around him from him crashing into it.

(Kaito)"I heard these are worth alot of money...f*ck it, I'm getting rich!"

He grabbed all the rocks, put them into a pocket dimension, and jumped back to Earth, almost knocking down the ship. When boros caught sight of him, he looked furious. He tried to hit him, but Kaito punched straight through his stomach.

(Boros)"This is it! You're the fighter I've been looking for!"

(Kaito)"Cool...Star Punches."

He threw a flurry of punches that ripped boros to pieces, and he managed to pull himself back together.

(Boros)"Very well, have a taste of my other trump card! I'll use ALL of my power to destroy you and the surface of the entire planet!"

His energy shot out in lighting strikes around the ship, and he fired a yellow-blue energy beam.

(Boros)"PLANET BUSTER ROAR CANNON!!!"

(Kaito)"...You just don't learn when to quit, do you? Have your little tantrum, but just so you know...I WILL NOT LET YOU DESTROY MY WORLD!!!"

He created a colossal Kaito Cannon, and fired a beam that dwarfed Boros', leaving him a dying husk.

(Boros)"Oh...I seemed to have lost."

Kaito healed himself, and returned to his normal self.

(Boros)"It was a good fight, we fought to the bitter end."

(Kaito)"..."

(Boros)"...Hmph, you weren't even serious. You showed no interest at all............you are too strong."

He coughed up some blood, and his life ended.

By the way.

Also, Metal Bat had an argument with the highest ranking A-Class, Sweet Mask, who blamed him and the other S-Class for the destruction of City-A, but don't worry, he won't get the last laugh. Victim of Reality appeared behind him, and broke both his arms and legs for being so arrogant. Since people can hear him, he said.

(VoR)"That's what you get, ya pretty boy f*ck face."

He never acted arrogant for the rest of his life.

(Omega)"You're welcome."

Kaito left the ship, and when Tornado asked him when he got inside, he ignored her, and was now walking home with Genos and Doppio.

(Tornado)"Hey! Stop ignoring me! I didn't even need anyone else here, I could've taken care of everything all by myself!"

She then called Kaito multiple names for a gay man, which irritated him greatly.

(Doppio)"Hey, just because he didn't need your help, doesn't give you the right to call him names!"

She used her telekinesis to launch him into the rubble.

(Tornado)"Know your place, B-Class scum."

This set Kaito off. He went into his pink form, grabbed her by the neck, and slammed her into the ground.

(Kaito)"NOW YOU LISTEN TO ME, B*TCH! YOU CAN SAY WHATEVER THE F*CK YOU WANT TO ME, BUT YOU CANNOT HURT MY DOPPIO!!!"

(Tornado)"G-Get off me!"

She tried to use her telekinesis on Kaito, but it didn't work.

(Bang)"Stop! We shouldn't be fighting with one another!"

He knew what Kaito was capable of doing, and he knew he would kill her with no hesitation, or issue.

(Kaito)"IF YOU F*CK WITH ME, OR MY DOPPIO, I WILL RIP OUT YOUR SPLEEN AND EAT IT!!!"

He helped Doppio out of the rubble, put him on his back, and went home.

(HP Prisoner)"He stood up to Tatsumaki when she hurt Doppio Baby...that's true love! I'm so jealous!"

When they got home, Kaito asked Genos a special question.

(Kaito)"Hey, Genos? Can you sell moon rocks?"

(Genos)"Yes, 1 gram can go for 16,000,000 yen."

(Kaito)"..."

He sold all the moon rocks, and they partied all night long.