Kanda, a neighbor living in company housing, breaks both his arms in an accident. At his husband's request, his wife, Yumi, takes care of him... Thanks to her, Kanda is able to get by despite the inconveniences of everyday life, but he is unable to release his pent-up sexual desire and is left feeling frustrated every day. Finally, he asks Yumi to help him masturbate. Yumi has no choice but to help him ejaculate, but her indifferent husband's sexual encounters are not enough, so she can't help but straddle his morning erection and shake her hips wildly...