This is a voice impersonation parody cover of the Hatsune Miku & Megurine Luka original by OwataP
Kuroko: You remember well. Today is my birthday.
Kagami: Oh, Kuroko, today’s your birthday, right? Happy birthday.
Kise: Isn’t today Kurokocchi’s birthday? Happy birthday!
Midorima: Today is Kuroko’s birthday… Happy birthday.
Aomine: What? It’s Tetsu’s birthday, isn’t it? Did you grow a little?
Momoi: Today is Tetsu-kun’s birthday! I wonder if he’ll accept my present.
Izuki: Today is Kuroko’s birthday? So that’s why he seemed so happy at practice.
Kasamatsu: Kuroko’s birthday? That’s why Kise went to Seirin, huh.
Midorima: Kuroko’s birthday… Celebrate it with everyone to the fullest.