Craftsman Kuroda crafts Hybrid Child, artificial beings embodying love. Kotarou Izumi, an heir, defies norms by welcoming Hazuki, a discarded Hybrid Child, into his prestigious family. Despite initial rejection, their bond deepens as they navigate familial disapproval. Over a decade, they learn the poignant truth that Hybrid Children are not immortal, exploring love and loss in three heartfelt tales of human-AI connections.