A service called "Substitute Mom" designed for those who grew up without experiencing a mother's love. It carefully conveys themes like emotional deprivation, how to express affection, and what love truly means, all while spending each day together, ensuring customers can genuinely enjoy themselves. Today, a breast-obsessed young man hungry for affection uses the service and indulges in an unusually intimate relationship he'd normally never experience. His actions prompt a surprised reaction: "Wait... isn't that... sex?" But that's precisely part of the service's unique appeal.