I Reincarnated as the Little Sister of a Death Game Manga’s Murder Mastermind and Failed

Description

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One day, Mai remembers that her perfect stepbrother is a character in a death game manga and that one year later he will hold a death game involving all of his classmates, killing his sister in the process. Mai plans a variety of surprises for her stepbrother every day based on what he said in the manga, “Nothing unexpected happened, so I was bored,” but as the days go by, he begins to show abnormal signs…

Only I know what my brother’s really like!

Associated Names
One entry per line
Desugeemu manga no kuromaku satsujinki no imouto ni tensei shite shippaishita
Desuge Imouto
It Was Such a Failure to be Reincarnated as the Little Sister of a Death Game Manga’s Murder Mastermind
デスゲーム漫画の黒幕殺人鬼の妹に転生して失敗した
Related Series
N/A
Recommendations
I Thought It Was a Fantasy Romance, but It’s a Horror Story (2)
You’ve Got The Wrong House, Villain (1)
Surviving as a Maid in a Horror Game (1)
The Correct Strategy to Approach the Yandere Supporting Male Lead (1)
Recommendation Lists
  1. Novels that would be great manga/manhwa/manhua
  2. Really Nice
  3. Feel-Good Pages
  4. Twisted Dark obsessive romances
  5. tending to my garden

Latest Release

Date Group Release
06/11/23 ChocoCats c50
05/30/23 ChocoCats c49
05/07/23 ChocoCats c48
04/29/23 ChocoCats c47
04/15/23 ChocoCats c46
03/19/23 ChocoCats c45
03/18/23 ChocoCats c44
03/06/23 ChocoCats c43
01/08/23 ChocoCats c42
01/01/23 ChocoCats c41
11/20/22 ChocoCats c40
10/23/22 ChocoCats c39
10/17/22 ChocoCats c38
10/09/22 ChocoCats c37
10/02/22 ChocoCats c36
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Review
24 Reviews


Mashiro-chan
Mashiro-chan
Aug 30, 2021
Status: c4
The plot is very intriguing and feels fresh from other reincarnation novels due to the sense of twistedness and danger. It kinda reminds me of Future Diary because of the genre.

The psycho brother is really scary and the sister just began with her operation to make things more entertaining for him. I am not sure if there would be romance developing from the two characters since they're not blood-related siblings. Or if the obsession with killing would persist with him until the end.

Excited to read the next chapters. ^^
36 Likes · Like Permalink | Report
endurableflame
endurablefla
Sep 27, 2021
Status: Completed
This is the absolute cutest thing ever. If you don't mind MTL just read it on syosetu using chrome page translation. Some parts are a bit hazy but it doesn't get in the way of overall comprehension. The only bad part is that it's too short, because some of the more intense emotions could totally benefit from a little more development.
31 Likes · Like Permalink | Report
evryday we fall lower
evryday we f
Mar 17, 2022
Status: Completed
I liked it. Has a surprisingly cute and wholesome conclusion for a story with a yandere ML. The pacing of the story is decent. Its fun to see Makoto (the ML) go from "everyone can die and I will enjoy it, " to "ew, FEELINGS for another person?! Gross." And I love how creative, innovative, and meticulous Mai is. It makes her efforts at surprising Makoto in order to prevent him from becoming a mu*derer so entertaining. ... more>>
Spoiler

And what's great is that before either of them realize it, her plan sorta works! Not the way she intended, but hey, what's important is that he doesn't become a mass mu*derer.

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I also liked the balanced distribution of his POV and Mai (the FL) 's POV. It was refreshing.


I would also like to add that the translation so far by Chococats is very good. Reading thru MTL just made me excited for their translations of later chapters because I know the experience will be much better when I fully understand the dialogue. I can get the gist of it through MTL but its not the same. Especially when ".... hah?" google translates to "..... teeth?" and "Mai, " translates to "dance." It's kinda funny because it sounds like Makoto keeps telling Mai to dance at the most random moments. <<less
29 Likes · Like Permalink | Report
Yuen
Yuen
Dec 09, 2021
Status: Completed
I love it~

It's so cuteee~

Spoiler
    • In the beginning, the brother is lifeless like robot but after the incident, he slowly transformed into yandere for mai. I love his internal monologue which goes like, "If you didn't want mai's life, give it to me. I will treasure her." (
      ) awww
    • The sister (mai) is not normal either. I mean, you know your brother is going to be mu*derer and the first thing she do is trying to make life fun for her brother. Honestly, even after she remembered the past life, she is still considered a brocon (but she didn't realize it)
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21 Likes · Like Permalink | Report
seekingsnow
seekingsnow
Oct 03, 2021
Status: Completed
This was actually pretty cute? I still don't really understand how the brother fell in love with the MC but their relationship is pretty cute, albeit strange? After all the brother is a yandere and the MC seems to be a little crazy too...
19 Likes · Like Permalink | Report
marsGF
marsGF
Feb 20, 2022
Status: Completed
It's surprisingly cute?!

I've read the manga (There are 2 available translated chaps) and fell in love with the concept! 🤩 By the time of this review, the translated chapters of the novel is just until chapter 20, but I can't wait so I MTL'd my way towards the ending.

It's not recommended to MTL it because it's confusing somewhat, especially when it gets to the brother's POV, although you can get the gist of it especially if you're an experienced MTL reader 😂. It might be at the way that the... more>> characters uses terms and pronouns, since the JP language does have it's complexity when it comes to using terms. Oftentimes, there's no specific pronouns at all in the sentence and the translating system adds pronouns by itself, which makes the scenes a bit confusing.

That aside, THE STORY IS JUST SO CUTE!! 💕 The brother is a psychopath then he was circumvented to become a Yandere, although that wasn't what the MC planned. The MC is also very quirky and weird because normal people would opt to stay away from psychopaths, but NOOO, the MC did various stuff to try to "surprise" her brother so that her brother's classmates will somehow be saved (?). It's weird, yes, but this story focuses on the gradual closeness of the MC and her brother, which is hella cute in my opinion. For people who likes Cute Yandere/Obsessive Characters, try to give this one a go. 😉 Sadly, it's a short novel and I really wished there was more. <<less
15 Likes · Like Permalink | Report
nobleflowrrleaves13
nobleflowrrl
Nov 07, 2021
Status: c23
It's really good, I remembered this novel when I was browsing on one of my most-visited manga pages when I saw the title and was reminded of this, this, great. It's really interesting, I was always into this type of novels and characters like her older brother are my absolute favorites. I like how she tries to prevent it and isn't full on horrified of what he's done- or, should I say? Will do. Since the title does say she failed. Still waiting for more chapters.. Im kinda going to... more>> rot here. This novel is good. Non-debatable because it is an undeniable fact.. Okay! Update, Ch.23. This just keeps getting better and better!! <<less
12 Likes · Like Permalink | Report
evilboop
evilboop
Nov 07, 2022
Status: Completed
Super interesting premise and lived up to my expectations until the end! Both POVs are interesting, it's fun to read and it's not too heavy. Read it in one sitting after I can't get enough of the manga. As usual, it is more detailed--passing/short information in the manga has more impact in the novel. I like how the shifting of POVs also tied loose ends (i.e., knowing the meaning behind their actions). Their behavior is also not fast-paced nor slow-burn, it's just right.

Highly recommended! I also think it's worth it... more>> to read from the start even if you read the manga. <<less
8 Likes · Like Permalink | Report
Loveboi
Loveboi
Aug 29, 2022
Status: c32
Yay I’m glad I found this novel. I actually like this type of novel tho rare. It’s a cute (slight scary) story of a sister trying to stop her stepbrother from committing mass mu*der (kinda vague but it’s true). Seeing him warm up to Mai overtime is so funny he’s like “what is the child doing” to “wait?? I care for her is this fEElings??” Or maybe a mix of both Haha I like how it’s going so far

... more>>
Spoiler

though honestly was surprised when I found out he actually liked her I was like whoa not expected but yandere cool They aren’t related so I don’t mind lol

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it’s fun so I and the translations are very good so I’m excited for the future chaps ╰ (*´︶`*) ╯♡ <<less
6 Likes · Like Permalink | Report
DENKI
DENKI
Oct 23, 2021
Status: c12 part2
Honestly I’ve read the first 2 Chapters of the Manga and was hooked and immediately searched for the novel.

I really like the flow of this Story because this isn’t about romantic love at first, she has a reason for doing all this and the surprise effect and her acting all eccentric is funny to me because I’ll think..

„What does he think now?“
6 Likes · Like Permalink | Report
xincliere
xincliere
Apr 08, 2023
Status: c45
I finished the currently updated translations and binged them in one read. They’re relatively short but they’re written nicely. The translator really did a good job in translating the story well. It can be quite deep and dark because of Makoto, but he is offset by the character of Mai.
Spoiler

They do get together and given the theme of the story itself, it’s not surprising.

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To those wanting to read the story, by all means. The translator did a really good job to convey the story. 🩵
5 Likes · Like Permalink | Report
Just_One_More_Chapter
Just_One_Mor
Sep 21, 2022
Status: c34
I love it so much omfg. I think the characters are really well written and consistent, especially for the ML (Makoto). Normally with stories having a yandere ML the ML somewhat changes for the better because he’s touched by the FL’s personality in some way. Makoto is not one of those MLs. He’s still very much an apathetic sociopath, he’s just directing all that craziness elsewhere. His POVs are also really interesting and it’s such an unnerving yet entertaining switch to go from Mai’s optimistic POVs to Makoto’s estranged and... more>> casually gruesome POVs.
The translators also did an amazing job on this. Can’t wait for more chapters <<less
4 Likes · Like Permalink | Report
TripleBaka
TripleBaka
Sep 18, 2022
Status: --
The translations is good.

ML is a sociopath. He wants to kill people/see death because he’s bored but the FL decides to change him with unfortunate results

Spoiler

Now he wants to manipulate and get with the FL romantically, even has a wet dream!

[collapse]

I love how it’s the FL and the ML’s perspective and their interactions with the character.

The writer doesn’t sugar coat the ML at all he’s nuts, a pure yandere.
4 Likes · Like Permalink | Report
Peridot_Granger
Peridot_Gran
Dec 26, 2022
Status: c40
I've been on the hunt lately for any novels or webnovels with yandere male leads and stalker romance. As for the former, on novelupdates. Com, this has always been on the list of recommendations. However, I didn't put too much expectation on this, for usually I get disappointed when I do so. After reading this, though, I'm really happy about the flow of the story. The FL and ML balance each other in this novel, not to mention the ML had me on the edge of my seat for being... more>> so damn manipulative. I highly recommend this webnovel. I'll be patiently waiting for an update. <<less
3 Likes · Like Permalink | Report
passionatum
passionatum
Sep 18, 2022
Status: c34
First off, I want to say that I’ve been following this since Kei at ChocoCats first started translating and along with the proofreaders they’re doing a wonderful job at sharing a translation that’s smooth and fun to read!

The premise itself is intriguing and I’m very charmed by Mai’s POV, while the occasional chapter in Makoto’s POV contrasts sharply with her personality in such a way that I never lose the sense of tension knowing what this is building up to.
3 Likes · Like Permalink | Report
Nikiiki
Nikiiki
Jan 24, 2022
Status: c20
Such a unique and thrilling concept that pretty well written! This novel really pulls knee deep into the story! Just wishing there were more chapters out but it's very good so far! Highly recommend
3 Likes · Like Permalink | Report
Realvnv
Realvnv
Jun 05, 2023
Status: Completed
I'll be quick and make a list.

  1. I didn't like the writing style all that much. We keep going back and fort in the timeline and as a goal oriented person I found it all too silly. Say, event B already happened, what is the point of showing E C F events that lead up to it in different POVs? I felt like I was reading novel from the back lol. Once or twice is ok for me but damn whole thing is like this.
  2. Characters felt a tad shallow ngl, their daily lifes weren't fleshed out enough and interactions were just meh. Average jp betas.
  3. No complains to TL, excellent job.
In short, good to waste time, don't expect sth that could open yer 3rd eye folks.
2 Likes · Like Permalink | Report
jjaybird
jjaybird
Aug 28, 2022
Status: Completed
it's a story with a surprisingly cute ending. The MC is endearing with her strategies to "surprise" her brother, but there's not a lot of depth -- though, tbh, how much can you really expect from these kinds of stories.
2 Likes · Like Permalink | Report
MusicFromMiles
MusicFromMil
Jun 10, 2022
Status: c30
The other reviews were right. This turned out to be unexpectedly wholesome and cute with some dark tones here and there. A very intriguing story to read, the brother is a true (almost) unfeeling psycho to the core
2 Likes · Like Permalink | Report
Milklee
Milklee
May 13, 2022
Status: c29
I love it so much! The MC is very cute and energetic, I really love MCs like her, while the yandere ML is very wonderful too ~ love how he slowly gets touchy with the mc! I can't wait to see more of them (`∀´) plot is very interesting and unlike other isekai stories

The translation is very wonderful too! Very easy and smooth to read! I always look forward to reading chococat's translation!
2 Likes · Like Permalink | Report
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