SEだった健一はAIに仕事を奪われ建設現場で日雇い作業員として働いていた。ある日、健一の元に届いたのはセクサロイド・未奈。一緒に過ごしていくうちに「健一さんの事好きになったみたいです」と… 初期不良か、バグか、あるいは奇跡か？本来の設計を超えて自律的に情報をインプットして徐々に人間らしく振る舞う未奈のことを健一は愛おしく思うようになり「未奈」と何度もベロキスし中出しセックスする毎日。

Kenichi, a former systems engineer, had lost his job to AI and was working as a day laborer at a construction site. One day, a sexaroid named Mina arrived at his doorstep. As they spent time together, she seemed to say, "I think I've fallen in love with you, Kenichi." Was it a manufacturing defect, a bug, or a miracle? Mina began to autonomously input information beyond her original design and gradually started behaving more like a human. Kenichi grew fond of her and spent his days passionately kissing and having unprotected sex with her.