Tsunade Kuroko is the twin of Tetsuya Kuroko, the phantom. She looked like Tetsuya, light blue hair and pale skin but she is the opposite of him. She don't have the gift of lack of presence. She is a cheerful person and is a woman of her word. She may look like an innocent-looking lady but when she got serious and angry, be ready for she kicks butts. She transfers to Seirin High and when Coach Aida and the others saw what she can do for the team, they made her the manager. Why did they did that? It's still a mystery ... for now. But Tsunade didn't transfer to Seirin just to be a manager of the team but to also forgot about whom she fell in love with when she was in middle school with her brother.

Everyone has weaknesses but how come the beast of basketball doesn't have any? That was most people think. Katsumi Aomine is Daiki's sister. She studies in Tōō just like her brother but she stays away from him for some reason that I can't reveal yet. No one knows her except her brother and her classmates. Even Momoi didn't know about her. Katsumi is never into basketball that's why she don't know anything about her brother's former team, Generation of Miracles. But when the curious copycat, Kise went to Daiki's house, he found out about Katsumi. What is Kise's role between the beast of basketball, his sister, and his weakness?