Sisters Yui and Rio, raised by their father after losing their mother. Their father had been unfaithful even before their mother's passing, leading Rio to live alone while Yui took care of him. One day, their father was hospitalized due to illness, but Rio refused to visit him. This is because Rio had been embraced by her father. Meanwhile, Yui harbored jealousy and treated Rio coldly. However, despite this, Rio loved her sister and tried to bring back the kind Yui from the past by touching her body…
