Seiichi Yukimura has been Reika Mizuno's classmate for the last 3 years. He is friendly towards everyone including her, and she would have wrote him off as a mere acquaintance she knew in Junior High, but one incident, just months before her graduation, changed the way she know him and tennis forever. SlightYandere!Yukimura x OC Please R&R. :) EDIT: Extended storyline