My One-Hit Kill Sister (2023)
A hapless isekai hero with rock-bottom stats gets rescued — repeatedly — by his absurdly overpowered, brother-obsessed older sister in a fantasy world.
My One-Hit Kill Sister - Series Information
- Original Title: 異世界ワンターンキル姉さん ～姉同伴の異世界生活はじめました～
- First Air Year: 2023
- Last Air Year: 2023
- Type: TV Series
- Genres: Animation, Comedy, Action, Adventure, Sci-Fi, Fantasy
- Episode Runtime: Average runtime per episode (23 minutes)
- Number of Seasons: 1
- Number of Episodes: 12
- Status: Ended
- Original Language: Japanese
- Spoken Languages: Japanese
- First Air Date: April 8, 2023 (Canada - 18+), April 8, 2023 (Germany - 16), April 8, 2023 (Australia - M), April 8, 2023 (Brazil - 14), April 8, 2023 (Mexico - C), April 8, 2023 (South Korea - 19)
- Networks: Tokyo MX, Sun TV
- Alternative Titles: My One-Hit Kill Sister (US), 异世界一击无双姐姐～姐同伴异世界生活开启～ (CN), Isekai One Turn Kill Neesan: Ane Dōhan no Isekai Seikatsu Hajimemashita (JP), 이세계 원턴킬 누나 ~누나 동반 이세계 생활 시작했습니다~ (KR), Другой мир и сестра, которая убивает с одного удара (RU), Mi hermana asesina de un solo golpe (ES)
- Production Companies: GEKKOU Production, Nikkatsu Corporation, FUTURE LEAP
- Production Countries: Japan
My One-Hit Kill Sister - Plot
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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My One-Hit Kill Sister - Cast & Crew
Main Cast
- Yuki Sakakihara
- Haruka Shiraishi
- Ami Koshimizu
- Azumi Waki
- Rio Tsuchiya
- Sora Tokui
- Konomi Kohara
- Yuma Uchida
- Reiko Suzuki
- Masafumi Kimura
Writers
- Yohei Kashii
- Chabo Higurashi
My One-Hit Kill Sister - FAQs
Is My One-Hit Kill Sister based on a web novel?
Yes, the anime adapts a popular Japanese web novel of the same name. The original story was published on the Shōsetsuka ni Narō platform before receiving a manga adaptation, and eventually this 2023 anime series produced by GEKKOU Production and Nikkatsu Corporation.
Why is Maya so overpowered in My One-Hit Kill Sister?
Maya's absurd strength is played entirely for comedic effect. When she followed her brother Asahi into the fantasy world, she somehow acquired massively overpowered skills — a classic isekai twist. The show leans into the joke that her fierce devotion to Asahi is the real driving force behind her limitless power.
Where can you stream My One-Hit Kill Sister?
My One-Hit Kill Sister is available to stream on Crunchyroll, including through the Crunchyroll Amazon Channel. If you prefer to own the series, episodes can be purchased on Amazon Video and Apple TV Store.
What genre is My One-Hit Kill Sister?
The series blends isekai fantasy, action, and comedy into a lighthearted anime romp. It leans heavily on comedic tropes — particularly the absurdity of an all-powerful, brother-obsessed sister paired with a hopelessly weak protagonist — making it more comedy than action despite its fantasy setting.
How many episodes does My One-Hit Kill Sister have?
The series ran for 12 episodes across its single season, airing from April 2023. Each episode runs approximately 23 minutes, making the whole season an easy binge at just under five hours total — a breezy watch for fans of comedy isekai anime.
Who voices Asahi and Maya in My One-Hit Kill Sister?
Yuki Sakakihara voices the hapless younger brother Asahi Ikusaba, while Haruka Shiraishi brings the hilariously overprotective older sister Maya Ikusaba to life. Their dynamic chemistry anchors the comedy, with Shiraishi in particular delivering Maya's dramatic declarations with infectious enthusiasm.
Is My One-Hit Kill Sister worth watching for isekai fans?
If you enjoy lighthearted isekai comedies that poke fun at genre conventions, it's an entertaining watch. The show doesn't take itself seriously, leaning into absurdist humor and sibling dynamics rather than deep world-building. Fans of series like Combatants Will Be Dispatched! or Wise Man's Grandchild will find familiar fun here.
What are similar anime series to My One-Hit Kill Sister?
Fans of the show often enjoy other comedy isekai titles such as Combatants Will Be Dispatched!, Wise Man's Grandchild, Handyman Saitou in Another World, and Chillin' in Another World with Level 2 Super Cheat Powers — all of which share a similar blend of fantasy adventure and self-aware humor.
More About My One-Hit Kill Sister
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