Pretty Yurika is the stepdaughter of an influential company boss and as such is enjoying her privileges at college – also due to her extraordinary looks. One day Yuusuke falls in love with Yurika and soon after they‘re a couple. However, after a couple of months, Yurika suddenly behaves strangely so Yuusuke tries to find out about what happened. It’s not long before Yuusuke learns that Yurika has become a sex slave to Morii. He in turn will save Yurika’s stepdad's company provided she stays with Morii.