The suddenly awakened Samecchi’s rapid advance knows no bounds. Samecchi’s daily routine was to fly around the Kanto region from east to west, like a black kite hunting prey.

「Cunning bastard! We, the Warrior Sentai Haraki Rangers, will push forward!」

「Fuukaahiiireehaaaaaaaa!!!!」

「We who love the mountains, Forestry Sentai Kikoranger!」

「Fukahirehaaaaaa!!」

「Fuuma[1] Sentai Ninjajan!」

「Haaa!」

By the time Rintaro’s bandages were removed after a week had passed, the number of hero teams defeated by Samecchi had grown to double digits. Rintaro only heard the after-action report from the Zako fighters on his bed.

「It was amazing, ui, Today we defeated three teams, ui.」

「That’s a pretty fast pace. …… Aren’t you pushing yourself too hard?　I hope nothing happens.」

Not only did Samecchi, who would normally be happy to report to him herself, but even Minato, the doctor, did not show up at the doctor’s office today. Rintaro stood up from the bed and rotated his shoulders to check his condition. He didn’t feel much pain anymore, but since he skipped training, he analyzed himself and thought it will take him a few days to regain his senses.

At that moment, Kirika came running into the infirmary with a different expression on her face.

「Senpai, Samecchi-san! Samecchi-san is in trouble…!」

「……Did something happen to Samecchi!?」

At Kirika’s urging, Rintaro headed for the Ark Dominion’s underground training ground. The Underground Training Ground is a training facility for the “Teaching Corps” led by Colonel Usanyi-Chan, and despite being underground, it is a huge space that is as large as a military training ground.

There, Rintaro witnessed an unimaginable scene.

「Sa- Samecchi……! Are you really Samecchi……!?」

The zako fighters had built a human pyramid, and a luxurious chair has been placed on top of it.

Sitting there proudly was a girl wearing large, glaring sunglasses and a golden gown. Her right hand was shaking a wine glass filled with juice, and her left was stroking a stuffed shark on her lap.

「Fuhahahaa, ssu！ Starting today, call me the strongest mysterious being, Samecchi-sama, ssu！」

「Hiiiiiiiieeen, Samecchi went rogue agaiiin.」

Underneath the human pyramid, Minato, dressed in a risque swimsuit, was crying and flapping a fan made of large leaves. She was wearing a bikini with a strangely small area of fabric, which must have been forcibly removed to create a certain atmosphere, it made people feel cold just by looking at her.

Samecchi was getting carried away as if she was a medieval Indian royalty or millionaires who had won the lottery.

Rintaro fell to his knees, clutching his head at the transformation of his youngest sister.

「She is growing so obviously conceited……!! Somehow, I think this has happened before!」

「It seems that she was influenced by the people around her. It’s interesting to watch, though.」

「Don’t be amused, Mayuzumi! Ah… Samecchi… Where on earth did the honest and naive Samecchi go…! I thought she’s been acting strange lately…!」

Ignoring Rintaro who hung his head in disappointment, Samecchi sipped the grape juice from the wine glass through a straw.

「The juice is too lukewarm, ssu! Samecchi wants to drink something colder, ssu!」

「Hiiiiiiiiiiiin, I am sorry, Samecchi-samaaaa……」

「Anyway, What’s with these breast! Is this an insult towards Samecchi, ssuka! 　Inexcusable, ssu! Samecchi will do this, ssu!」

「Hieeeeeen! Ple- Please stop! Hurry up and go back to the original Samecchi!!」

Samecchi had Minato pinned down and was playing with her body as she pleased. Behind them, the human pyramid collapsed, and the Zako fighters sank into a sea of nosebleeds.

「Fuhaha, ssu! Does’ it feel good, ssu? Do ya’ like it ‘ere, ssu?」

「Hiiiiiiiiiiiiiiiiiin! Yah, S-Stoph, that place is……!」

Kirika, unable to bear witness to such barbaric behavior, took a step forward. Rintaro, who was leaning forward a little, followed Kirika.

「That’s it. Samecchi-san, isn’t it about time for you to wake up?」

「Aaaaaaan, ssu?」

「That’s right, Samecchi, let Minato go. What the hell is wrong with you?」

「Aniki!? Th- There is nothing wrong with Samecchi, ssu！ Samecchi has been like this from the beginning, ssu！」

Although Samecchi was confused by aniki’s sudden appearance, she jumped up and down and defend herself. Taking advantage of that opportunity, Minato quickly hid behind Rintaro, wearing only the few clothes she had on hand.

「Awawawawa…… You saved me, Rintaro…… Please stop Samecchi……!」

「Ah! You can’t run away, ssuyo! Samecchi is number two in the heinous legion and the strongest, so it’s okay to fondle her breasts, ssu!」

「Do you thing we are Norse Vikings!　How can there be such a tyrannical law?」

It seemed that Samecchi had no intention of changing her attitude in front of Rintaro. Kirika snapped her fingers and threatened the angry Samecchi.

「Senpai, it seems like it would be better to make her understand.」

「Hey, stop it, Mayuzumi. Violence among friends is not good.」

「Don’t worry, it’s just sparring. Besides, don’t you want to find out how she beat the hero team one after another?」

「……That’s true, but……」

Rintaro was also concerned about Samechi’s “awakening,” which was the cause of her sudden increase in strength. The rapid progress, as if she was a different person, was too sudden to be called growth, and Rintaro was certain that there was something behind it.

Perhaps this power is something that should be handled with great care. It would be better if the cause of the problem could be detected in the hand-to-hand combat with Kirika, rather than in a dangerous actual battle.

「I see…I guess it’s a good opportunity to measure the current skills of Samecchi…」

And in all likelihood, Kirika will not fall behind against Samecchi.

「How is it, Senpai? Furthermore, it seems like the other side is motivated.」

Samecchi took a shadow-boxing stance toward Kirika, who was quietly standing. It seemed that neither Kirika nor Samechi had any intention of retreating.

「All right, but in exchange, neither of you can hurt the other. When I say stop, that’s the end of it. Can you both promise that?」

「I don’t mind」

「Samecchi is also fine with it, ssuyo!」

「Okay, then this time is special. Also, whether you win or lose, Samecchi wil have an important conversation with aniki.」

Thus, it was suddenly decided to hold the Heinous Legion Special Match.

After evacuating Minato and the zako fighters to safety, the two sides faced each other in the center of the large field.

On the one hand, there is Mayuzumi Kirika, a perfect, flawless, and perfect dark-haired beauty, who is the strongest in both her own and others’ eyes. On the other hand, there is Samecchi, the self-proclaimed strongest little shark girl, who doesn’t look good in her sunglasses and golden gown.

Both of them were fully enthusiastic about the fight and ready to begin at any moment.

A touch of uneasiness crept into Rintaro’s mind.

(Even though it’s a spar, I didn’t expect these two to go head-to-head……. I hope they can both take it easy on each other…….?）

However, they were all direct subordinates of the Heinous Mysterious Death Green, a.k.a. Rintaro. If you can’t trust your subordinates, what kind of a leader are you, Rintaro thought to himself.

「Okay, are you both ready?」

「Perfectly. I’ll make you understand, and show you how to behave when your child gets carried away.」

「Too bad. The current Samecchi is stronger than Kirika. After all, she is the number two and strongest of the heinous legion!」

「I have no intention of giving up my position as legal wife. Senpai is mine forever」

「Aah, No, ssu! aniki is Samecchi’s, ssuyo！」

「Hey, are you guys sure it’s okay?　Do you understand the meaning of what I just said?」

Despite Rintaro’s misgivings, the two took their stance.

A black tornado-like aura rose from Kirika’s body, and a black armor-like shell covered her limbs. On the other hand, a black flame-like aura also welled up from Samechi’s body, and purgatory swirled in the depths of her eyes.

「Kukuku… as expected, it’s more suited to my nature to take what I want by force.」

「Nufufu, ssu…… Hino-chan’s power is invincible, ssu, burn kirika black and show aniki Samecchi’s good side, ssu」

「I told you not to hurt her, didn’t I? Huh? Did you not hear me by any chance?」

Without waiting for Rintaro’s signal, the curtain dropped on the battle between Kirika and Samecchi.

---

[1] Reference to Fuuma no Kojiro. A manga series by Japanese author Masami Kurumada, later adapted to anime. It tells the story of sword legends and rivalry between ninja clans.

<135: Death Metal Sentai Hell Romeo Five
137: Darkness Mysterious Being Drakirika vs. Fanged Shark Mysterious Being Samegalo>