You were daichi’s younger sister, you were younger than him by three years , so while he was in his 3rd year of high school you were 1st year of high school. The team should go travel to tokyo for training camp, he takes you with him, because parents are at the work and they won’t let you stay home alone. There you met Kuroo, he saw you only as a younger sister, but you secretly have a crush on him, the only person who knows it is kageyama, kageyama is your bestie