竜の子に呼ばれた保育士は、黒曜の竜と悠久に番う (Associated Names)

Ryuugasaki Mamoru is a childcare worker who loves kids, but due to various circumstances has lost his self-confidence. On his way home from work, he hears the voice of a child asking to be saved, and when he answers the plea, he gets sent to another world. He promptly gets run down by a pitch…