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AKA: 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〜 (Japanese), Isekai Wan Taan Kiru Nee-san: Ane Douhan no Isekai Seikatsu Hajimemashita, One Turn Kill Sister in Another World: I Started Living in Another World with My Older Sister
Genre: Isekai "comedy" / incest
Length: Television series, 12 episodes, 24 minutes each
Distributor: Currently streaming on crunchyroll
Content Rating: 13+ (fanservice)
Related Series: N/A
Also Recommended: I'm Standing on a Million Lives (better harem isekai series), Uncle from Another World (for an isekai that's actually funny)
Notes: Baed on the web novel series written by Konoe, published by Shousetuka ni Narou. A manga, also written by Konoe and illustrated by Kenji Taguchi, currently runs in Shogakukan's Monthly Sunday Gene-X seinen magazine.

My One-Hit Kill Sister


Asahi Ikusaba can't escape the avalanche of anime clichés. First he's laid low by Truck-kun, and then he finds himself in an isekai world. But most of all, his obsessively bro-con older sister Maya also manages to cross over into his new world, and she's constantly trying to get physical with him- when she's not fighting battles for him; for some reason, she's entered this world with almost omnipotent magical powers, while he's a weakling.


I'm an only child, so I don't have any real authority to speak on this I guess, but I think that an older sister who wants to "licky-lick" her younger brother is a bit outside normal sibling parameters.

This show seems to think that this sort of thing is not only amusing, but that incessant repetition of it is even more so. Maya's even worse if Asahi makes the mistake of praising her or thanking her, but she can manage to molest him just fine even with no provocation at all. There actually were two things I really liked in the show, but Maya's over-the-top bro-con antics far overshadowed EVERYTHING else. Alas, it made my final rating of the show inevitable and inescapable.

Of course there's also the fact that the show's title sort of rips off that of Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?. But while Mamako in that one did get rather casual with her son Masato, I don't recall her ever actually trying to jump her son's bones. And Masato really wanted to win some victories, but kept getting upstaged by his mom. Asahi, on the other hand, is (at least at first) a coward, though willing to take undeserved credit for his sister's victories. Granted, he DOES get better later; he himself notes that the world he's in works like a video game, and game characters usually get more powers over time (sometimes, as apparently here, just as participation prizes rather than for real achievements), and Asahi gets two of them - both DEFENSIVE powers, of course, as suits his personality. (The first one would have suited Monty Python's "Brave Sir Robin" quite well.) I mean, later he's struggling to defeat goblins, usually Level One menaces; the lead in I'm Standing on a Million Lives was taking on goblins with FARM IMPLEMENTS, for Pete's sake, while Asahi has an actual sword.

I suppose a harem is also standard equipment with these shows, so of course it's here as well. Though there's one interesting omission in the harem; specifically, the best female character in the show. (I'll get to her later.) So his group of adventurers, called the Super Asahi Legion, is composed of dross female characters, again pretty much as he deserves. His Legion of Clichés include:

- Maya, of course (Sigh...)

- Gloria Brigandine, an insanely strong blonde with a gigantic sword, but sorely lacking in the brains department. She belongs to a very wealthy family.

- Kuon, Gloria's kuudere, super-powered maid (where would ANY bad anime be without a maid??)

- Sophie Peaceful, who seems to follow a rule that "healer" characters in these things have to come from something similar to a nunnery. Sophie's cloying toward Asahi (she always calls him "Exalted Hero"), but the "Peaceful" part is heavy-handed irony. Sophie is an idiot who has a tendency to say or do exactly the wrong thing at the wrong time, creating trouble for Asahi and company. (But Asahi finds her "cute", so she meets his criteria for inclusion, I suppose.)

Honestly, there was really NOTHING in the aforementioned group of girls that appealed to me. But as I said earlier, there were two things that DID:

- The show has two opening songs during the season. Both I found pretty bad, but the second opener was not quite as annoying as the first. But the one closing was remarkable. Grampa is not always current on musical trends, but In The Day we would have called this style "New Wave".

- Kilmaria. Kilmaria's supposedly a general in the Demon King's army, but she has an independent streak, and usually just follows her own whims (including developing a fondness for Asahi). Kilmaria is the only other character in the show with magical powers comparable to Maya's, and those two are forever dueling with each other, while Asahi is trying to get them to at least limit the collateral damage. Kilmaria comes equipped with the usual horns and fanservice-friendly outfit, and has a fondness for alcohol, but she often disguises herself as a regular town girl. My favorite scene in the whole show is where she (again disguised as a human) is strolling through town with Asahi, and they wind up in a bell tower, where Kilmaria quietly makes a proposal to Asahi; NOT a wedding proposal exactly, but still one that in other circumstances would be considered outrageous nevertheless. But HERE, given the choice between Asahi's insanely bro-con sister, versus the (relatively sane) demon girl, there was no doubt in my mind that he should have gone with the demon girl's idea.

I guess I should also mention I kind of liked Tanya, the gyaru (remember, NO trope is left unused here) who hands out the quests to Asahi and company, and whose appearance and dress (in OR out of uniform) don't seem very authentically medieval.

Kilmaria and the closing song are both too good for this show. Even without "Maya-nee's" overbearing sexual assaults on her brother, it's filled with all the familiar isekai harem stereotypes.Allen Moody

Recommended Audience: I don't remember any actual nudity per se, but Maya's and Kilmaria's outfits (and physiques) are both fanservice-friendly, and of course there are continual attempts at not only bad, but ILLEGAL behavior by Maya.

Version(s) Viewed: stream, Japanese with English subtitles
Review Status: Full (12/12)
My One-Hit Kill Sister © 2023 Konoe / Kenji Taguchi / Shogakukan / "Isekai One Turn Kill Sister" Production Committee
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