魔王によって衰退した人類の存続には勇者の血が必要と考え至った王国は、
勇者にたくさんの女性と子孫を残してもらい子孫繁栄を義務付けた。

以下勇者に渡された書状より抜粋

その１
勇者は子孫を残す女性を選ぶことができるものとする

その２
この書状を読んだものは勇者の子孫を残すことを拒否することはできない

その３
できた子供は国で支援するのでいくらでも産んでよいものとする

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奴隷だったころに勇者によって救われた女の子。
勇者には返せないほどの恩義を感じており、子孫繁栄の話を聞き自分もと考えたが、
こんな自分にそんな価値はあるのか？勇者の邪魔にならないか？など考えてしまい、
でも勇者の子供が欲しいと悶々とした結果、凶行に及んでしまうのだった。

In order to secure the survival of humanity after going into decline due to the Demon Lord, the Kingdom came to the conclusion that the Hero's blood is necessary;
therefore, the Hero was ordered to perpetuate his descendants by having many women bear said descendants.

Below is an exerpt from the note that was passed along to the Hero

No. 1
The Hero is able to decide the women who will bear his descendants

No. 2
Those who read this note will be unable to refuse bearing the Hero's descendants

No. 3
The children born will be supported by the state, so the more born, the better

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A girl that was saved by the Hero when she was a slave.
She feels a debt of gratitude towards the hero that she can never repay, so when she heard about the perpetuation of his descendants, she thought about doing it herself, but was she really worthy of such a thing? Wouldn't it be a bother to the Hero? She was beset by such thoughts, but because she wanted the Hero's child so badly, she ended up committing a crime.