Everyone thought Shiromi Lovecut-Toothrough was the worst summoner in the world. But after she summons Sharkiller, a creature capable of transforming into Hollywood's most ferocious B-movie sharks, nobody's laughing now! In fact, they're running for their lives! With her bloodthirsty buddy chomping at the bit to kill everyone in sight, can Shiromi defeat the Demon King and end his reign of terror? Or maybe the realm would be better off if she didn't...?

With Sharkiller's help, Shiromi vanquishes A-Ellm by giving him a taste of his own medicine--a nightmare even more horrifying than the one he cooked up! Along with Zeldan, the crew's newest member, the gang presses onward to the imperial capital of Hogwartch, where the world's armies have united to take the Demon King head-on. But are the people's victory celebrations premature? And can Shiromi and her bloodthirsty familiar ever truly be on the humans' side?

Shiromi only ever wanted someone to acknowledge her... But even after slaying the demon general Apapanelle alongside her unintended familiar, Sharkiller, nobody's ever said "Great job!" Maybe it's because she accidentally destroyed that village. Or that time her shark ate the adventurers she was trying to save. Or perhaps it's got to do with the fact that everyone she ever meets ends up in the jaws of a shark from a terrible Hollywood B movie. But surely they'll forgive her if she takes do...

With the Hamunanptra Kingdom arc having reached a bloody conclusion, Shiromi and her trusty shark take to the skies for their next adventure. But what do world saviors do between their adventures? Yup, it's time for the hot springs episode! But a Killer Shark volume wouldn't be complete without a twist, and the dream-manipulating demon general A-Ellm is here to slice through their moment of respite!

After a brief encounter with pirates on the high seas, Shiromi and her violent familiar, Sharkiller, embark on a brand new adventure in the Hamunanptra Kingdom, a land of deserts, mummies, and thinly veiled Hollywood movie references! When the disastrous duo meets Nupi, the nation's princess, they vow to aid her in overthrowing the mad King Scorpion. Well, Shiromi wants to help her, at least. Sharkiller's just looking for its next snack.

Whether it's demon generals, corrupt leaders, or innocent bystanders, nobody's safe from Shiromi and her unstoppable familiar, Sharkiller. Having teamed up with the princess of the Hamunanptra Kingdom, the two are determined to take down the dreaded King Scorpion. But just when it looks like they've finally met their match, Sharkiller awakens to a brand-new power! And it's not a movie reference this time!