I Was Reincarnated In a Yandere Main Love Comedy Game And Suddenly a Dangerous Girl Became My Younger Sister


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One day, when I was looking at a single girl, I realized that this world was the world of a certain game.

In a world with a horror setting covered in a romantic comedy, the girl who became my little sister in that world was the one who would later kill me.

Associated Names
One entry per line
Yandere Chisome
Related Series
Since I’ve Entered the World of Romantic Comedy Manga, I’ll Do My Best to Make the Heroine Who Doesn’t Stick With the Hero Happy. (1)
Recommendation Lists
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Latest Release

Date Group Release
01/30/23 Sky Parade Translations c67 (end)
01/29/23 Sky Parade Translations c66
01/29/23 Sky Parade Translations c65
01/28/23 Sky Parade Translations c64
01/28/23 Sky Parade Translations c63
01/27/23 Sky Parade Translations c62
01/26/23 Sky Parade Translations c61
01/25/23 Sky Parade Translations c60
01/25/23 Sky Parade Translations c59
01/24/23 Sky Parade Translations c58
01/24/23 Sky Parade Translations c57
01/23/23 Sky Parade Translations c56
01/23/23 Sky Parade Translations c55
01/22/23 Sky Parade Translations c54
01/22/23 Sky Parade Translations c53
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7 Reviews sorted by

New Kilo181 rated it
February 4, 2023
Status: Completed
I read this story earlier this week and I'm already struggling to remember details from it. Overall it's pretty forgettable.

I initially picked it up because I thought it'd be about the MC trying to survive the yanderes but the MC quickly solves the issue early on and it becomes mostly a fluff/slice of life story. I don't mind stories like that but there are ways to make them interesting and give them substance with character interactions and events. This story unfortunately doesn't do that. Almost all the female characters instantly... more>> get along with the MC and there's no conflict.

There are a few times where there is conflict between the MC and the antagonist but it's poorly written and made me cringe while reading it. The emotional payoffs the story tries to go for aren't good either.

Somehow I managed to finish the story while hoping it would get better.

It didn't. <<less
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New aPizza rated it
January 31, 2023
Status: Completed
Binged it. Finished it. Loved it. Lots of fluff and yandere vibes (more of clinginess than full on yandere).

Fun interactions with the game heroines and their eventual evolution. Especially the protagonist of the game.

... more>>

He's a reincarnated person like MC who wants harem, but he's an arrogant prick cuz he thinks he's special cuz he's the protagonist. He successfully captures one heroine. But, remember this is a yandere game world. She became his gf and tamed him to a subconscious level and he's not aware of it lol.


Shame it's not harem since MC interacted and rather got close with the other heroines. But, hey at least he got two in a sense so that's close enough.

Also, a clarification about FML and her shadow demon for any getting confused from reading the reviews.


MC's little sister, Chimose, has a supernatural being that's a part of her. She's not a demon or anything. They don't exactly know where she came from or what she is. But, she has the same look as Chimose minus some cool spooky look and she eventually becomes human-like. She, called dark Chimose (kuro Chimose) then named Mashiro, can cause fear, devour people, and make it seem they never existed. She is like a quiet twin sister of Chimose and acts like one too.


Good read. Definitely try if you like fluff and actual progress with a cute little sister that's yandere-like plus her "twin sister" and seeing a game protagonist (not MC) getting rolled over. <<less
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Andou67 rated it
September 27, 2022
Status: v1c2
Pretty promising so far. The tags don't list it but it seems like MC was reincarnated in a game with multiple yanderes so maybe harem tag? I read chapter 1 of the raws a bit before the translated version and thought the little sister character had a metaphorical dark shadow but no, she has a literal shadow demon thing possessing her. So, a supernatural tag too.
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IEMOZ rated it
November 4, 2022
Status: c21
Painfully fluffy. It's very much pure love and vanilla, technically harem but not really, anyone that despises harems won't mind. You'll see what I mean in literally the first chapter so give it a try.

Tl'd author note indicated there aren't any other girls involved in the group, so shouldn't change later in the story either.

For really lazy ones who want a spoiler re harem

Chisome (sister) and her "monster" Kuro Chisome are the FLs, Kuro Chisome is basically Chisome's stand so... Not really harem imo?

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Freshl0517 rated it
January 20, 2023
Status: --
Jojo references: the review

To begin with the translation isn't the best. It's readable and grammatically correct most of the time, but it still feels awkward. The character dialogue is ok, but the MC's inner monologue is very stiff. Anyway, on to the story.

Main FL (who was adopted at 14, not blood rated and same age as MC) has a stand, it's basically better version of Okuyasu's 'The Hand' or Vanilla Ice's 'cream', it has the ability to erase people and addition it can erase other people's perception of the erased... more>> person. Kinda like what the soviet KGB did to xxxxxx xxxxxxxx, IE: completely eracing all traces of their victim, and even photoshopping them out of old photos.

Like Koichi's Echoes act 3, the FL's Stand is sentient, and it often talks, but only the FL can hear it, at least in the beginning. Our protagonist can see it, barely, and already knows about it, but nobody else can. Also there are no other known stand users in the setting.

Anyway, like Kakyoin, the FL is troubled by her stand because she feels alone in a world where a part of her is completely hidden. She's unable to make meaningfull connections or friendships, and becomes a completely isolated loner. That is, until our protagonist comes in.

After making her first connection with another human being, perhaps in her entire life, she becomes completely obsessed with our protagonist.

So the main FL is a yandere with a killer stand, and our protagonist is a normie geek who loves gal games.

PS:the protagonist's dad is the first to get erased, which is how we learn about her stand ability, but he's an abusive dad who tried to r*pe the FL so it's ok that his existence was completely eradicated off the face of the earth. <<less
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LongXi rated it
November 20, 2022
Status: --
Okay this is the ultimate fluff, they make their thoughts clear to each other, they don’t hide stuff. So there’s no misunderstanding bs. The only aversion I have is that I always have this question, “are being like chimose common, also how is able to roam around without being caught?”
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Novel Casanova
Novel Casanova rated it
November 18, 2022
Status: --
Mostly a slice of life fluff.

Its not that I dislike it particularly, its just, theres nothing happening, just like every other slice of life.

Also the harem tag is unwarranted. Its not even a love triangle, much less a harem, as the other reviews already state. The MC himself shows absolutely no signs of pivoting from this and the author's comment just solidifies it.

the translator calls the novel as "yandere chisome" which is the name of the girl, but that is nowhere to be found on this page
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