[COMPLETE] Haikyuu: My Queen (Kageyama x Kuroo x OC x Oikawa)

Rin will become Oikawa Tooru's little sister, but their relationship will be in a trouble since he confessed to his soon-to-be little sister. Her studying at Karasuno with her friend, Kageyama Tobio, was her greatest decision.... or is it...?! Then, her childhood friend, Kuroo Tetsurou, suddenly appeared from her life...