身高约149公分的小个子，却最喜欢打篮球的少年车谷空。他刚进入九龙头高中（谑称人渣高）就读，便为加入篮球社而鼓足干劲。他在宽敞的体育馆，穿上珍惜的篮球鞋练球，突然出现一群一看就是不良少年的坏学生们。这些坏学生正是篮球社的社员。男子篮球社已经荒废许久，实质上处于机能停止的状态。车谷空被主将百春警告不准打篮球，还被反锁在社团室里面。在同属篮球社的千秋的帮助下，总算离开社团室，前往体育馆。此时，以百春为首的篮球社员又再度出现。

以加入男子篮球社为赌注，阿空与百春等人开始比篮球。男子篮球社的百春、安原（小安）、茶木（恰奇）、锅岛（小锅），再加上代替千秋的女子篮球社的小圆，进行一场五对一的对决。不管情势如何险峻，阿空展现出篮球技巧准备投篮，却被小安的暴力行为妨碍而失败，就在此时百春提议进行十球对决。不公平的比赛虽然让阿空陷入危机，但他却有秘密武器。

在篮球运动中，身材矮小的车谷空绝对是吃力不讨好。因为身高因素，阿空在初中时代从未获选为先发球员。对于高中篮球社充满期待的阿空，进入九头龙高中，通称九头（人渣）高就读。然而校内的篮球社几乎处于机能停摆状态，完全不是能够打篮球的环境。但是阿空以他对篮球的热情，与九头高篮球社成员一边磨合冲突，一边共同成长。面对接踵而来的各种困难，九头高篮球社的成员们，要如何去因应……

丸高的不良学生为了让百春等人丢脸，策动丸高篮球社与其进行练习赛。除了千秋以外，其他四人都参加比赛。阿空对于初次的五对五篮球赛充满干劲。然后到了比赛当天。队长千叶与王牌常盘，是神奈川县排名前五的实力选手，所有队员皆具备有利身高优势的丸高篮球社登场了。即便在不利的状况下，阿空宣告自己有秘密策略。对阿空而言，第一次比赛的哨音响起了。

百春与阿空在比赛一开始就使出秘密策略。千叶开始思考如何因应他们的快攻。然而常盘看到阿空的表现后，竟发现就连阿空本人都没有察觉的弱点。被锁定弱点的阿空，在常盘面前投篮不进。比赛情势开始改变，完全由丸高所主导。而且好不容易凑齐5人比赛，小安却因为五犯退场，演变成只有4人上场的局面，阿空的疲倦也来到顶点。在险恶的情势下，九头高篮球社陷入走投无路的境地……

在疲劳达到临界状态下，阿空使用妈妈传授的双手投篮成功进球，改变了团队的气氛。虽然与丸高的差距已无力回天，但九头高依然拼命奋战。在一旁看比赛的千秋，看到这种情况便转身离去。看到九头高努力不懈的样子，丸高的不良学生开始妨害比赛。阿空制止愤怒的队友，希望继续进行比赛，但却苦无克服困境的办法。就在此时，有个人来到篮球场上。他不仅是阿空等待已久的人，更是丸高的千叶所在意的人。

虽然与丸高的比赛以压倒性的分差输掉了，但是双方的战斗变成了互相交流的友谊赛。把累到趴下的阿空送回家的小圆，从阿空的祖母那里听闻了阿空为了让自己母亲·由夏而来到了神奈川的事情。比赛第二天九头高的篮球社一大早便开始了练习，发现他们因为没有顾问老师，甚至连体育馆的使用权都未曾拥有。百春马上去找了顾问老师请求体育馆的使用权，但有个条件。与此同时，阿安、茶木、阿锅在教学楼背后遇见了一个投了完美投球的一年级学生。

以引起问题就立即废社为条件，九头高男子篮球社获得校方指派的顾问，并且取得活动许可。就在此时，在校舍后方与小安等人发生冲突的阿鸢，不顾女子排球社正在练习，独自强行练球，还让对方社员受伤。后因百春下跪道歉才将事情化解，但隔日阿鸢又在体育馆与其他学生打架。篮球社顾问五月见状便宣布篮球社废社，因阿鸢表示自己并非篮球社的人，让篮球社免除废社的命运。然而百春与阿空对这样的结果无法释怀。

阿鸢的退学处分确定了。暴力事件起因于西胁率众挑衅，阿鸢实属正当防卫，但却无法翻转退学的处分。被阿鸢球技所吸引的阿空，拜托五月想办法撤消处分。另一方面，阿鸢与偶然相遇的千秋相谈甚欢，在与途中加入的百春交谈后改变了自己的心意。阿鸢去找五月，宣告自己将带领九头高进军高中联赛。刚好校长也在场，在校长的善意下，阿鸢加入篮球社。然而隔天却遭遇西胁的报复……

看过丸高在关东大赛的比赛后，九头高的成员们燃起斗志。在练习时，阿空的球鞋坏了，为了修理妈妈给的球鞋，阿空跑了好几家运动用品店，最后来到隔壁班七尾奈绪家。奈绪虽然冒冒失失的，但是却能依阿空的球技给予球鞋上的建议，在修鞋的期间，为了让阿空继续练习，奈绪还借出自己的球鞋，体贴的对待阿空，对阿空的打球的样子赞誉有加。第一次体验这种感觉的阿空，隔日到了体育馆后，发现奈绪成了篮球社的经理。

奈绪观看九头高篮球社的练习后，直接表示这支球队无法打赢比赛。而为了验证奈绪所言是否属实，男子篮球社将与女子篮球社进行比赛。奈绪擅自答应如果女生队输的话，小圆就必须脱光的条件，瞬间激起阿空等人的干劲，并在比赛中顺利得分。但在奈绪让小圆等人执行战术后，比赛开始有了变化……

男子篮球社与女子篮球社的比赛依旧进行当中。阿鸢看到比赛的情况，抱怨男生无法打赢，奈绪便告诉阿鸢男生队无法打赢是因为尚有不足的地方。胜负就这样成为定局。看到败给女生之后，便失去干劲的男子篮球社，奈绪也跟着沮丧了起来……

离高中联赛预赛只剩一个月的某天，在奈绪的提议下男篮社进行集训。奈绪相信九头高能打进高中联赛，于是给予成员们严苛的训练内容，大家也拼命配合训练，然而在安原认真实践自主训练时，锅岛与茶木却不如安原认真训练。

锅岛与茶木从集训脱逃，阿空外出寻找他们。两人和国中生比打篮球却手足无措，因此变得十分沮丧。不料看到国中生打篮球被女生夸赞后，对篮球突然燃起斗志，重回集训。集训第一天就食物中毒的百春也恢复健康，于是奈绪提议打一场练习赛。最后决定与奈绪的表哥蒲地太郎所属的北住吉高中，举行一场练习赛。

The players of Kuzu High have just one practice game to prove they’re worth taking seriously. Has their training camp paid off, or will Kitasumi High dominate the court?

As Kitasumi High gets serious, Nao unveils Kuzu High’s super secret defense strategy. It’s time to knock out the competition — and Sora is the key to victory.

Although guarding Taro is exhausting, Sora’s intense eyes make it clear that he’s ready to face the challenge head on. But can Chucky say the same when he takes to the court?

With Sora on the sidelines, Tobi becomes the target of Kitasumi High’s latest defense strategy: the insidious 2-2-1 zone press.

Dedication. Perseverance. Commitment. These are the qualities that make a basketball champion — and thanks to Konishi, Momoharu isn’t sure if he possesses any of them.

As Sora steps into the role of pointguard, Chiaki steps into the spotlight. The fate of the game hangs in the balance, but will their change-up lead to victory or defeat?

A final shot will decide the fate of the match against Kitasumiyoshi High. As the dust settles, Madoka makes a difficult decision.

The school basketball tournament pits teammate against teammate. As Sora and Tobi face off, a towering new player steps onto the court.

Mokichi’s height gives him an undisputed advantage on the court, but when it comes to basketball, height alone can’t outpace the pressure of lofty expectations.

Midterms have arrived, and the team will have to hit the books if they all want to enter the tournament preliminaries. Meanwhile, Madoka makes a shocking discovery.

After a sleepless night, the first match of the tournament has arrived. But Kuzu High isn’t the only team pinning their dreams on this game.

Hobble a key player, and the entire team will fall apart. Chiaki learns this lesson the hard way when the players of Shinjo High render his passing abilities obsolete.

Kuzu’s early lead makes no difference to Shinjo High, who quickly takes control of the game. Subbed in as pointguard, can Sora turn the tide back in his team’s favor?

As pressure builds and halftime approaches, Chiaki makes a decision that could shake the entire team. Will he leave Kuzu high and dry or rally in time for the second half?

As Kuzu dominates the court, the prospect of winning fades for Shinjo High — but help is on the way from the team’s most unlikely player.

Despite his terrible knee injury, Kojima’s skill are formidable, but he isn’t the only member of Shinjo High that Kuzu should keep on their radar…

As the end of the game draws near, the players of Kuzu High push themselves to the limit. Only one thing’s for certain: Stamina will decide their fate.

With only seconds on the clock, the pressure of defending the lead falls squarely on Kuzu High. But winning the match isn’t the only thing Sora needs to worry about…

Reunited at long last, Sora and his mother have a lot to talk about — and time is of the essence. Elsewhere, Sora’s teammates deal with the aftermath of their recent match.

Sora is nowhere to be found, and in his absence, the basketball team must pick up the pieces. Whether they will succeed depends on the fire burning in their hearts.

A new challenger with mysterious motivations approaches Tobi for a game of one-on-one. Meanwhile, Sora returns, but the basketball team isn’t the same club he left behind.

The team must find a new advisor, so they take matters into their own hands — but will Satsuki be willing to return to the basketball club? Better yet, will Momoharu?

It may be raining, but nothing can douse Sora and his teammates’ fiery passion for basketball. Proving that passion to the administration, however, is another matter entirely.

Restless and unfocused, Madoka takes the night off to hang out with friends. But fun turns to fear when Madoka realizes she’s lost something important in the pouring rain…

Chiba is determined to take Maru High to the top! And with only one more chance to reach the inter-high, they’ll have to pull out all the stops to beat Yokohama Taiei.

Yokohama Taiei is a force to be reckoned with, but not everyone is suited for a spot on this infamous team. Elsewhere, Sora seeks out a previous opponent for guidance.

The day of the match against Yokohama Taiei descends along with a wave of unprecedented heat… and Tobi is nowhere to be found.

After a rocky start, Kuzu plays surprisingly well again Yokohama Taiei — but when a new player enters the game, the tide abruptly turns.

At rock bottom, the only way to go is up. Tobi knows this all too well, and he’s determined to take Kuzu High all the way to the top! But first they need to take Taiei down…

What’s a pint-sized point guard to do when the opposition shuts down every play? Advice on the matter comes from an unexpected source, but it may do more harm than good.

Once they find the spark that sets them alight, Kuzu High will not be stopped. The spark that sets Sora ablaze? Another player who will bring out his full potential.

Sora gets a run for his money when a pokerfaced new player leaps onto the court — and into the role of the opposition’s point guard.

Some players run toward the finish line; others stop or slow down along the way. With Chiaki’s help, Tobi intends to sprint straight to winning against Yokohama Taiei!

It’s the final period of their match against Yokohama, and the fate of the Kuzu High basketball team hangs entirely upon their performance in the last few seconds of the game.

The match is finally over, and one question remains: Have the players of Kuzu High done enough to save the basketball club, or have their inter-high dreams come to an end?