A Tokyo couple undergoing treatment for aspermia and their consequent infertility live a settled, ordinary life. One day, they come across a TV program advertising Baby Baton, a not-for-profit association intended to match couples who cannot procreate with mothers who do not want to raise, or cannot raise, their natural children. As they watch, the couple realizes adoption could be a perfect alternative to their painful and frustrating treatment.
And so Asato, an innocent child born of pure adolescent love — the kind of love made of sheer, intense beauty — is delivered into the wealthy, orderly life of his adoptive parents. Six years later, his young mother comes looking for him, having grown out of the petty, narrow-minded world she lived in when she gave birth as a teenager.