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A couple, desperate to enhance their intimacy, delve into the world of Japanese adult education, seeking answers to their persistent issue of premature ejaculation. The husband, eager to please his wife, explores various techniques to prolong his pleasure, from sensitive handjobs to intimate anal play. The wife, a dominant figure in their dynamic, guides him through SM-inspired games, attempting to delay his climax. Their journey is a mix of intimacy, frustration, and determination, as they strive to find the perfect balance between pleasure and control.