Kent, who was preparing for exams, was having Yuki, the older sister from his neighborhood, teach him. They had made a promise when they were young… 'We'll get married someday.' One day, Yuki found erotic manga featuring only blonde girls in Kent's room... It turned out that teenage Kent was totally into blondes!! Shocked, Yuki vanished from in front of Kent... One month later... she reappeared before Kent, transformed...
