Neither fully machine nor fully human, the various Hybrid Child models develop strong emotional bonds with their owners. This volume contains several short stories of love, sacrifice and drama. Young Kotaro learns the importance of responsibility when his Hybrid Child's lifespan runs out. The tragic swordsman Seya learns to love again with the help of his Hybrid child, Yuzu. The final tale tells the story of Kuroda, the creator of the Hybrid Child designs, and how his lost love inspired their creation.

    She knows his secret too. He is the coolest guy in school. She is the curve wrecker of class. They make a deal in exchange to keep each other’s secret. They should be strangers after that promise. But he offers to help her confess to her crush at the same time. Is that true? Is he just teasing her? Or…?