Koshimizu Koharu, an 30-something woman with little romantic experience, has always wanted to redo a love that ended in high school when she was too shy and couldn't do anything about it. Upon entering a new company, she unexpectedly meets Date Ritsuka, the man she had a crush on at the time. This coincidence makes her determined to ask him out to dinner, but she gets drunk from nervousness... and when she wakes up, she's naked in bed! Date makes a proposal to her after she apologizes for the previous night's mistake: "Become my slave." Koshimizu wants to be promoted from slave to lover, and Date, while nonchalantly brushing it off, acts suggestively. What will become of their love?!