You go to Seirin High School where you enter a basketball team and one day you enter the gym where they said they'd test you out and the moment you enter you meet everyone training

Riko: "There's the newcomer I said that would be joining our team!"

Junpei: "Isn't our team full?"

Shinji: "Yeah but it wouldn't hurt having someone new after all."

Kagami: "He has a point but we do need to see if he's worthy enough to be in the team."

Kuroko randomly appears in front of you as Testuya 2 does the same and sits down on the ground

Kuroko: "Hey there."