Non-Zero Sum

Description

Warning: The series is under the tag "비욘드 하드코어", which means beyond hardcore, meaning it contains potentially triggering themes, including coercive relationships, sexual assault by multiple partners, gaslighting, and stockholm syndrome.

Seo Hae-young, the only light of Yoon Hae-won, who has no money, no family, and no future.
After Ko Tae-gyeom, his "friend", reveals his feelings for him, Hae-won's life begins to fall apart.

Tae-gyeom demands a relationship through threats, Hae-young wields violence in an unknown manner, and another friend Joo Hyun-woo joins the ranks...

The broken relationship between the four people, the memories of the past that are now faded.

Who will win the irreversible game?

Official Novel:
Web Novel, ebook Novel

Official Webtoon:
Bomtoon, Lezhin

Official Translations:
T.Chinese
Japanese: Beltoon, Lezhin

Notes:

- The novel's official English title is 'Non Zero Sum Game'.

Type

Manhwa

Related Series

N/A

Associated Names

ノン・ゼロサム

非零和博弈

非零和賽局

논 제로섬

논제로섬

Groups Scanlating

Cupid Scans

Latest Release(s)

c.18 by Cupid Scans 4 months ago

c.63 by Cupid Scans 4 months ago

c.62 by Cupid Scans 4 months ago

Search for all releases of this series

Status in Country of Origin

69 Chapters + Review (Ongoing)

S1: 36 Chapters + Review (1~36)
S2: 33 Chapters (37~)

Completely Scanlated?

Anime Start/End Chapter

N/A

User Reviews

N/A

Forum

0 topics, 0 posts

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User Rating

Average: 6.1 / 10.0 (21 votes)

Bayesian Average: 6.18 / 10.0

14%

24%

10%

14%

10%

19%

Last Updated

September 3rd, 2025 6:17pm PDT - 2 weeks ago

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Genre

Adult Drama Mature Psychological Smut Tragedy Yaoi
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Categories

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Category Recommendations

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Revenge (Lee Geum-San)

Frenzy Train

Recommendations

N/A

Author(s)

Artist(s)

Year

Original Publisher

Serialized In (magazine)

Bomtoon (Deep Plum)

Lezhin (Deep Plum)

Licensed (in English)

English Publisher

N/A

Activity Stats (vs. other series)

Weekly Pos #200

(-4)

Monthly Pos #137

(+5)

3 Month Pos #263

(-168)

6 Month Pos #300

(-65)

Year Pos #255

(+64)

List Stats

On 108 reading lists

On 117 wish lists

On 6 completed lists

On 3 unfinished lists

On 78 custom lists

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Forum Posts Click to view the forum

User Comments [ Order by usefulness ]

Not really proud of liking it but here we goes.

by Macabreriz
2 months ago

Rating: N/A

This manhwa finally gave prooft to me on how peoples trauma affects on their enjoyment of reading fk up contents, including me. I ask few other and they would always answer with this manga is too much. I do not talk for the perspective of all folks that have Chronic post traumatic disorder, but i am one. This manga articulate well of tragic mental manipulation on the most extreme form and to think this does happen in real life, fked me up. Sometime i read some of the chapter and start holding my breath, i took a walk to process thing. This felt real this manhwa felt REAL. It doesn't cover traumatic reaction in a flower baskets, it cover it in Thorn. Throwing you into pack of hyenas and spat on you. Peoples with CPTS exist and some even behave as such, especially when being put on the abuser, fight or flight situation. All the goddamn time.

The protagonist behavior and his abuser, exegratingly make sense to me and its painful read. But i never get close to any other media that treat ptsd as real as this. Other than on war film. Do you know CPTSD can happen by simply having a shitty childhoods?

Despite all the negative connotation i write here, i actually enjoy reading this. Slowly healing from CPTSD had make me experience stoning.. in which i can't felt much emotions, but this Manhwa make me relive it again. That exist.

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The Most Painful Thing I've Ever Read

by quicksilverreads
4 months ago

Rating: 7.0 / 10.0

I love angst, but there comes a point when it's just too much for me. This is that point for me. For me, there has to be some sort of relief from the angst. A soft place for the reader and the protagonist to take a breath. Maybe I didn't read far enough to see the relief, but I couldn't take the pain anymore.

When all three semes were revealed to be rapist pieces of crap, I lost interest. And the 'nice' one even has the audacity to look down on the other two, even though he admits to himself that he raped the MC and didn't care.

I might pick it back up sometime later and try again, but for now, I'm going back to my grayer angst.

... Last updated 4 months ago

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Horrible !

by Lili_1082
5 months ago

Rating: 1.0 / 10.0

I stop at chapter 15, I see no interest in this webtoon other than the illustrations. The scenario is a succession of physical and sexual abuse. It's just disgusting and pointless.

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I love it

by dia69
2 years ago

Rating: 10.0 / 10.0

I love it Psychological thriller with Stockholm Syndrome. Just the genre's tragedy leaves a bitter taste in my mouth. The first 14 chapters are really good and the beautiful art design supports the darkly tragic atmosphere.

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