After Lou Gan, the interstellar God of War, perished alongside the Insect Queen, the System chose her to become the doomed beloved of various male supporting characters in an old-school Mary Sue novel.
Her mission is to turn the beloved into a lovesick female supporting character, and drive the male characters' affection for them down to -100.
According to the System, readers these days love sweet romance and absolutely cannot stand the heroine's man being ambiguous with other women.
The System reviews Lou Gan's life as a human weapon and feels very reassured: You can do this. You have no idea what being ambiguous even means.
Lou Gan recalls her past life, sacrificing herself for the people, and feels immensely proud: I can do this. I'm the best at being a lovesick fool.
Everything is going well. The first male supporting character's affection steadily drops, and the System is confident in Lou Gan, so it leaves behind a submodule while its main body slips away to pursue a side hustle.
A year later, the System returns and nearly crashes on the spot.
The original heroine, who should have been proud and haughty, has become a scheming, spiteful jealous type. But the people she targets aren't Lou Gan: they're the first, second, and third male leads.
Lou Gan, who should have faked her death several times, is calmly surrounded by admirers. She raises a hand to greet the System: Things have changed, but it's no big deal. Their affection is still at -100.
The System stares in horror at the first, second, and third male leads, all looking deeply in love despite their "-100 affection," and investigates the affection submodule overnight. Its data is a complete mess.
It discovers that the affection values are displaying backward.
Positive values are showing as negative, and negative values as positive.
So an affection score of -100 actually means positive 100.
The System asks Lou Gan: Now that things have come to this, would you like to be the heroine?
Lou Gan calmly holds her sword to the System's neck: Send me home. You deceived my feelings.
The System looks at the male supporting characters, who have turned from male gods into lovesick fools, and nearly cries: Who the hell deceived whose feelings here?
Theme: Negative emotions are an important part of being human