Mido Sayoko, a female high school student who is not good at sports, studying and personal relationships. One night, she was selected by future people from the 27th century as an experimental body called [Opponent], as teaching materials for a university class.
Special abilities were given to kill each other, but Sayoko’s ability were neither nullification nor elimination ability, it was really [Nothing].
Sayoko struggles just to survive every night with there having no way to fight against an ability person. However, after a certain night, she decided to fight.
…To kill all opponents, including herself, except for one person.



Popular Reviews
It's really good, with nice artwork (credit to jimao様). The story includes character development, tense moments, unrequited love, gore, and yandere vibes.
[Spoiler] They got together, though they are dead. Kyouka will join them later. The revenge plot was good, maybe even great, but I wanted more scenes showing her decision to kill all the 27th-century students, especially the three girls. I thought Kyouka would take personal action, making them suffer slowly. Sadly, that didn't happen. [/Spoiler]
The character development of Sayoko is really impressive. Although she showed tendencies of a psychopath from a young age, this was clearly demonstrated midway through the story. She's a natural.
As for Kyouka, despite her initially problematic personality (though you can't judge a book by its cover, considering her tragic past and the fact that she's only 10 years old, a university student who skipped grades), she also undergoes significant character development.
The time travel aspect might be confusing, as they mention it's not important whether they can change history, which seems odd given the principle of cause and effect. However, A。Lica addresses this issue.
Additionally, the fate of the people who knew the deceased students isn't addressed. The author doesn't mention what happened to the parents or friends of the victims. Were they worried? Their reactions are not discussed.
The rape scene near the end was unexpected but also somewhat predictable, given the nature of the three wealthy, despicable girls who thought they could get away with anything. But they didn't.
[Emphasis] THEY ACTUALLY DID IT TO A 10-YEAR-OLD!? CUTE KYOUKA, JUST BECAUSE SHE OUTSMARTED THEM WITH HER ADORABLENESS AND INTELLIGENCE?? THESE MONSTERS DESERVE THE DEEPEST HELL; THEY SHOULD BE SKINNED ALIVE SLOWLY, CHOPPED INTO PIECES, HEALED, AND THEN TORTURED AGAIN FOR ETERNITY... [/Emphasis]
Phew. Anyway, it ended on a good note, I guess. Maybe I'm just the weird one who hopes for no happy endings.
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