Als sich die Erstklässler für die Vorbereitung auf den Winter-Cup für ein Streetball-Turnier einschreiben, ahnen sie noch nicht, welche bekannten Gesichter sie dort treffen werden. Vor allem Taiga erlebt eine Überraschung.
The first years participate in a street basketball tournament, with Kiyoshi subbing in for Kawahara. They run into Seiho and learn that only the top eight teams from the Inter-High can participate in the Winter Cup heats. Seiho loses to a team with a member from Yosen, Himuro Tatsuya, whom Kagami knows from America. Tatsuya introduced Kagami to basketball, and they became close friends to the point of calling each other brothers and wearing matching rings. However their rivalry led to a misunderstanding between them, and Tatsuya bet his ring on their next game. Meanwhile, Riko tells the 2nd years the results of the Inter High: First Rakuzan, Second Touou, Third Yosen. With the members of the Generation of Miracles benched during semi-finals and finals. As the tip-off begins between Tatsuya's team and Seirin, Murasakibara Atsushi, another member of the Generation of Miracles, from Yosen High, shows up.
윈터컵을 향해 연습을 거듭하던 나날. 카가미와 쿠로코는 시합에 나가지 못한 세이린 멤버들의 제안으로 휴일에 길거리 농구에 참가하게 되는데... 카가미는 그곳에서 우연히 미국에서 알고 지냈던 어떤 사람을 만나게 된다.
Os primeiros anos de Seirin participam de um torneio de basquete de rua onde eles encontram Tatsuya Himuro e Atsushi Murasakibara da Yōsen High.
Los de primer año del Seirin participan en un torneo callejero de baloncesto donde conocen a Tatsuya Himuro y Atsushi Murasakibara de la Preparatoria Yōsen.
為了在冬季杯上能全面對抗“奇蹟世代”，城凜高中籃球部進行了高度的強化訓練。某日，參加練習球賽的黑子一行，在會場遇見了火神在美國結識的兄長：冰室辰也。過去一起學習打籃球、相互競技籃球技巧，在沒有分出勝負的狀態下就分開的兩人，面對這樣的兄長，火神的態度卻很模棱兩可。為何火神會如此態度…？另一方面，和冰室同屬陽泉高中籃球部的“奇蹟世代”紫原敦也出現在了會場。
La Seirin si prende una pausa dagli allenamenti per partecipare a un torneo di streetball, in cui una vecchia conoscenza di Kagami fa una ricomparsa inattesa.
誠凛高校バスケ部は、ウィンターカップでの『キセキの世代』との全面戦争へ向けて、激しい練習を積んでいた。そんなある休日ストリートバスケの大会に参加した黒子たちは、会場で火神のアメリカ時代の兄貴分・氷室辰也と出会う。かつてともにバスケを学び、技術を競い、決着をつけられないまま別れてしまった因縁の相手に対し、煮え切らない態度を見せる火神。そんな火神だが……？ さらにそこへ、氷室と同じく陽泉高校バスケ部に所属する『キセキの世代』紫原敦が現れる。
