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Series

My One-Hit Kill Sister

202323m7.0 / 101 seasons

Asahi, a boy who loves video games is killed in a traffic accident and ends up in another world. He tries to enjoy the otherworldly adventuring life he's always dreamed of, but his stats are on the level of an NPC's. He is in big trouble and is being chased by a monster when he hears, "Fear not, little brother!" and the monster is killed in one hit by Asahi's older sister, Maya, who followed Asahi to this world. So Maya has acquired some seriously OP skills, but she takes her adoration of her younger brother to extremes. Thus begins their story about an overpowered older sister with a brother complex and a younger brother with the weakest of stats in another world.

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Available in US

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Season guide

Season 1

12 episodes available

Episode 1: Did You Call for Your Big Sister?

24m

Asahi is your average game otaku. Just when he thinks his life is over, he gets another chance in a world that seems just like an RPG! But he doesn’t have the cheat skills that isekai heroes usually have. Instead, someone familiar swoops in to save him.

Episode 2: You Call Me Your Sister?

24m

Asahi takes on an easy quest gathering mushrooms to gain experience points, but it ends up being more than he bargained for when a bear appears! He flees right into an unexpected, warm embrace. The softness, the strength… Wait. It’s not Maya-nee?!

Episode 3: My Sister, Maya-nee, Is All I Need

24m

Asahi is still looking for ways to level up, but working with his sister has its limits. So, he goes to the Guild with the thought of forming a party with other people. On the way back, he notices some thugs hassling a drunk who looks a bit familiar.

On screen

Cast & Characters

Yuki Sakakihara

Asahi Ikusaba (voice)

Haruka Shiraishi

Maya Ikusaba (voice)

Ami Koshimizu

Kilmaria (voice)

Azumi Waki

Sophie (voice)

Rio Tsuchiya

Tanya (voice)

Sora Tokui

Gloria (voice)

Konomi Kohara

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Episode 4: The Big Plan for the Home of the Ikusaba Brother and Sister

24m

Asahi has run out of money to pay for his lodgings again, so he goes to Tanya to ask for a quest with a high reward. It turns out that Tanya has just the thing, one with a house as the reward! But to get it, they’ll have to rid it of its current occupant.

Episode 5: The Ikusaba Brother and Sister's Big Dungeon Exploration Plan

24m

A new dungeon entrance has been discovered! Tanya asks Asahi to explore it to see if it’s safe. If it is, it will be opened up to all adventurers of every rank. Asahi is excited about taking on a quest by himself, but, alas, it is not to be.

Episode 6: The Hero and the Big Sister

24m

Asahi is soloing a quest to get rid of some wolves. Maya is overjoyed with his improved strength, but she still worries for his safety. If only they had a healer in their party. Back in town, Asahi bumps into a strange girl on the street.

Episode 7: Portrait of a Certain Big Sister and Little Brother

24m

Asahi and Maya didn’t always have the relationship they do now. Once, it was much different. A strange twist of fate makes Maya remember the old Asahi. Later, Asahi learns a shocking truth about Tanya and has to prove his mettle as an adventurer!

Episode 8: I Can't Raise My Sword Against a Girl

24m

Asahi is on a quest to take down a party who uses its status for evil, but one of their crimes hits a little close to home—falsifying ranks. An adventurer who is suspicious of Asahi decides to take a closer look at him. Will Asahi’s secret be discovered?

Episode 9: The Preferred Form of a Big Sister

24m

Asahi and Maya go out on a gathering quest. Sophie joins them, but Asahi manages to pair Sophie and Maya so he can go off on his own. When he’s ambushed by goblins, an unexpected blast of dark fire reminds him of the first time he met Kilmaria.

Episode 10: My Amazing Little Brother

24m

Kuon asks Asahi for a favor. Gloria is challenging herself for the sake of her future, and she needs Asahi's help! Or does she? Later, Asahi considers making a big change to his life as an adventurer and goes to Tanya for advice.

Episode 11: Shark from Another World

24m

Asahi is given a quest to hunt down sharks that are attacking a local beach. Maya says that just the two of them should go instead of taking the whole Super Asahi Legion. But when they arrive, the whole party is already there! And Kuon has some bad news.

Episode 12: Big Sister Forever

24m

After a heavy rain, the city is victim of what appears to be a flood. A closer examination will quickly prove to Asahi that this is not the case: the entire lower part of the city has been attacked by a giant slime, and moreover, it did not come on its own initiative...

Kuon (voice)

Yuma Uchida

Siegfried (voice)