Oikawa has a younger twin sister that went to America because their parents divorced when they were 4 following her mother to America . The twins childhood friend is Kita shinsuke . She returns to Japan and starts attending inarizaki high . How will Oikawa and Kita react to her return? Find out as you read the book Ideas @April-channnn_ Haikyuu characters do not belong to me I only own y/n oikawa