She is devoted to her work and has no interest in men. One day, a single woman named Yui happens to pick up a human and decides to keep him in her room as a 'pet'. Yui can't help but let her guard down to the gentle man... not only that, she even lets him take over her body, and heals her to the Kokoro with melting kisses, cunnilingus that feels too good, and sex where they embrace like lovers...! The two continue to live happily together, but the man is nothing more than Yui's 'pet'... The man, who wants Yui to be happy, makes Yui cum over and over again with hot and intense sex in the end...!