Bokuto Koutarou. Everyone knows the name of Fukurodani's ace, but what about his sisters? Not his two older sisters, but his younger sister, Yuya. Practically a carbon copy of her older brother. Having followed him around ever since she could walk, she too walks the path of a volleyball player. So how will she fare in her first year of high school? DISCLAIMER: I do not own Haikyuu. Furudate Haruichi does. The only thing I own from this fanfic are my ocs.