尾丸榮一郎是個標準的優等生，全科都得A的他被同學們暱稱為榮兒，而他的筆記更是詳盡到連輔導書都望塵莫及。每天都把自己的行程安排妥當的他準備增加自己的體能，而可以免費體驗的網球俱樂部便是他的首選，來到網球俱樂部後他發現曾經弄髒他寶貝筆記的鷹崎奈津也在這裡，跟不上體能訓練的他本想放棄，但看到鷹崎奈津為了理想奮鬥的身影后榮兒改變了想法。

決定參加網球俱樂部的榮兒這一週內都選擇跑步回家，來到網球訓練場的他雖然跟上了基礎的訓練但並不懂得如何打網球。在教練打電話期間鷹崎決定教榮兒基本的網球知識，而這讓一旁的阿逞非常不滿，在訓練中榮兒找到了完美擊球的感覺。為了再次打出完美擊球的感覺榮兒整個週六都在對牆練習，不斷做著筆記和重複練習的他能否會成功呢？

週六還在繼續練習的榮兒遇到了鷹崎，多事的影山更是對著鷹崎説出了榮兒的努力。聽從鷹崎的建議榮兒來到俱樂部練習，他那全神貫注的神態已經讓鷹崎的目光無法移開，不管在俱樂部還是學校內擁有實力的阿逞都表現的非常隨性，當參觀發球的榮兒問及他是否以職業選手為目標時兩人卻產生了爭執，兩人的矛盾轉化為了球場上的對決。

逞和榮兒一決勝負，50球中只要回了1球的話就算榮兒的勝利，現在回想起筆記本的參考，一邊看逞的發球一邊忠於基礎打擊的決心，在全國級逞的強有力的發球打擊下，比賽的主動權逐漸被推向逞這邊，就在這個時候，“球給你！”突然聽見奈津的聲音，那聲音使榮兒拿出了勇氣身體向前移動了！

第一次參加比賽的榮兒，因為STC其他人的建議各有不同，使本身就很緊張的神經變得更加混亂了。比賽即將開始，心卻無法平息，榮兒只有硬著頭上了。第一回合的對手是湘南工業學院網球部副部長縣大賽的8強選手，擁有5年網球經驗的強敵大林良。終於榮兒的第一次比賽開始了！

天生的好眼力使榮兒開始對對手開始了預測，榮兒以十分粘人的打法使對手沒那麼簡單拿分，但在經驗上大林良更為出色的解決了這個問題。觀戰的三浦教練注意到了榮兒的眼力，但榮兒的比賽過程還是在教練的預料之中，只是比賽過程稍微長了點。為了擺脱榮兒粘人的打法，大林良想把比賽節奏打破。最終，比賽勝負去向是榮兒，還是…

聽從教練的安排榮兒來到了STC一號球場，在這裡教練將教會他如何取勝，場上的九宮格是為了鍛鍊他控球能力而專門安排的。善於總結和不斷練習的榮兒很快便掌握了控球的要領，而與阿逞的比賽卻讓他回到了現實，不在一個次元的力量讓理論無法實現，但榮兒不但沒有因此放棄還特意安排了自己的日程，阿逞從榮兒那裡看到了自己的不足。

比賽裡因寫筆記而被人稱為“寫筆記的傢伙”的榮兒，在打網球的日子裡。但比賽始終無法堅持勝利更長遠，與對手的差距被顯露出來。榮兒為此很苦惱，跑步讓身體體質進一步加強。時光流逝，成為高中二年級的榮兒他們，就這樣，新的一年即將開始。

與大林比賽後的一年，再次出戰神奈川少年網球大賽的榮兒，在賽前熱身打壁球也很有氣勢。然後在會場與同為競爭對手的宮川卓也、荒谷寬見面後，那不服輸的鬥志被點燃了。被問起誰會贏的時候奈津回答“榮兒一定是颱風眼”，然後比賽終於開始了。

對戰第5號種子選手宮川卓也的榮兒。宮川有著180cm的身高，以不斷的強打為武器的實力選手。家裡是經營網球俱樂部的，從懂事開始就一直在打網球。在比賽中有喝昆布茶和吃梅乾來補充能量的習慣。對於榮兒來説，這是檢驗這一年來練習成果的時候，勝負從現在開始。

冒險地攻擊宮川而苦戰的榮兒，總算打到搶7局了，為了勝利必須突破宮川的發球局。榮兒開始使用眼力來粘住對手。決勝球沒把握好，彼此不相讓的比賽最終必須要突破。就在這時，不想輸的榮兒突然發現還有贏球的可能性。為了勝利兩人的激鬥的結果是？

稍微變得強了的榮兒，接受了臨時來STC的佛羅里達體育心理學家·麥克的指導。相對於技術方面麥克更支持精神方面，讓榮兒回憶初次見到奈津的場景，意義不明的榮兒，但還是聽從了麥克的建議閉上眼回憶起當時的情景。精神得到解放的榮兒第一次打進了第四輪比賽。

榮兒此次對戰的對手是一個相對於榮兒來説年長的人，巖佐博水是個很安靜的男人。打球風格是力量型的腦力派，所有擊球都能靈巧處理，有難度的擊球也能巧妙的掌握的強敵。可是，他卻沒有興趣知道下次對戰的對手是誰，榮兒對此完全無法理解他的想法。“在球場上畫畫的時候是最高興的”，他説的話意思是？

長時間對戰的榮兒和巖佐的比賽。榮兒以自己擅長的韌性獲得了壓倒性的優勢，但巖佐卻出現了危機，再這樣下去會輸給榮兒。在麥克的指導下，回想起自己最佳狀態。總算將比賽的主導權把握住了的榮兒，反觀仍然執著在球場上繪畫的巖佐，在這場漫長的比賽中誰到底支配著戰鬥？

擁有野獸之稱的荒谷寬是左撇子選手，具有神奈川縣No.2的實力者。即使對手拿到了比賽主動權也能夠以強健的體能奪回。反擊武器為奪取主導權，並且速度、力量、精神力都能將高速回擊來的網球打出去。所有的實力都在自己之上的對方，榮兒準備用之前收集來的情報作為武器來向荒谷挑戰。

榮兒對荒谷的第一次反擊取得了成功。但是，因此荒谷的鬥志燃燒了起來使得攻擊愈發激烈，讓榮兒奪取比賽的主導權十分艱難。設法保住自己的發球局，榮兒必須在比賽間隔時不能輸。擅長頑強忍耐的榮兒與荒谷繼續展開猛攻。為奪取比賽主導權的榮兒繼續苦戰著。就在這時，荒谷出現了到現在為止沒有出現的錯誤。

榮兒就能突破了，如果取得了荒谷的丟掉的失分。速度和力量交給了到現在為止的戰鬥方式，就能攻略荒谷的比賽，被緊逼的榮兒終於到了決勝局了。但是絕不不放棄的榮兒，對荒谷攻擊開始能應付，最終比賽進入了平局。對到現在沒有將力量完全釋放出來的兩人，勝利的去向是？

奈津暱稱爽醬的神秘男子與榮兒相遇了。那個本來是3年前去美國佛羅里達州留學，不久後將以職業選手出道的池爽兒。對成為職業選手的想法逐漸開始的榮兒。但是，從現在練習日程來看似乎離大家還有點距離，該怎麼辦？迷茫了。就在這時，奈津邀請榮兒一起去觀看池爽兒職業出道比賽，觀看完比賽後榮兒終於有了決定。

以職業選手為目標的榮兒，與同年紀的職業選手池爽兒進行練習比賽，技術的事之前從身體的構造完全不同的感覺。這樣對榮兒身體改造是三浦教練最優先考慮的事情，準備了兩個月左右的練習菜單，嚴格的訓練覺悟榮兒克服了，“相信你能克服的”對三浦教練説的話感到緊張。然後特訓終於開始了。

為改造肉體而特訓中的榮兒，在學校文化祭的時候，身為文化祭委員的榮兒，不過為了給特訓做準備，而拜託給了同級同學佐佐木姬子，這樣榮兒還是在鬼屋和執事咖啡廳的活動中表現很活躍。百忙之中，休息下來的榮兒得到了奈津帶來的慰問品。兩人關係很好地説出自己的事情。

榮兒的下場比賽是全日本青少年關東地區預選賽。第一回合的對手是大賽的1號種子，並且在大阪全日本青少年大賽中擊敗阿逞的難波江優。突然對戰強敵而不知該如何是好的榮兒，但還是重新振作起來研究阿逞對難波江優的比賽錄像。但是，榮兒想看的是比賽中守備的關鍵，和阿逞對戰的難波江優打球風格為之一變成為帶有攻擊性的東西。

與難波江的比賽開始了，順利進攻的榮兒成功中斷了對手的擊球，搶到了比賽主動權。但是隨著難波江的開始反擊，在序盤的難波江積蓄數據。榮兒的忠於基礎的發球風格被難波江分析出來，並開始對榮兒進行追擊。要做的事全部都被封印了，就像被中讀心術一樣，榮兒感到再這麼下去會輸的，榮兒將會…。

曾經，在筆記本上畫100分割格的時候還是來了。但是100分割格來控球實在是太勉強，怎麼也無法進入目的地。為了勝利榮兒只有考慮這個辦法了，回想起教練説的“所有的球只要能控制住的話就不會輸”，想起要打敗難波江就只能這樣了。

大家都回去後榮兒仍然在堅持練習。再這麼下去不行的，就這怎麼能取得全國級水準而感到焦慮不安的榮兒這麼想的。並且繼續跑步著的榮兒的在入口附近發現一可疑的男人。於是那個男人讓榮兒代他向三浦教練問好，説教練把錢借給那個可疑的男人，對此十分相信的榮兒決定繼續去跑步，但是那個男人説跑步時的姿勢要注意。

青井教練對榮兒説今天和明天就不要太過使用身體了，不如去做一下自己想做的事情，為此而苦惱的榮兒被影山機智地約出來，讓榮兒與奈津約會。看電影唱卡拉OK地度過了兩人愉快的時光，影山要榮兒去向奈津表白，被突然説中的榮兒感到緊張，奈津意識到榮兒的不自然而對榮兒先行表白。結束了一天的休息幹勁十足的榮兒，在練習時突然收到青井教練的建議，去美國網球留學？

Eiichirō arrives in Florida, and Coach Mike introduces him to Marcia, an upcoming junior whose older brother just made the Pro's. Marcia and Eiichirō play a match, and Marcia decides Eiichirō must be training for the French Open because of his slow play style.

Eiichirō begins closing the gap on the others at the Florida Academy, but during everyone of his matches he has one moment where he presses too hard, costing him a set and eventually costing him the match.

After winning his first match in America, Eiichirō finally gets to play Ike in a one set match. Ike gets it approved at the New Years party where many of Eiichirō's new friends first learn of Natsu.

In his final day in Florida Alex agrees to play a best-of-3 match with Eiichirō. Alex realizes that Eiichirō's notes contain all of his weaknesses and that he will have to adjust his play style to win the match.

Eiichirō returns from Florida and is given a day off to adjust his body to the time difference. After the day off Eiichirō begins a new strict training regime to help him get ready for the Kanagawa Prefectural.

Coach Aoi explains to Eiichirō that he stopped the match against Takuma because his body wasn't developed to serve like Takuma yet. If he had continued to serve that way, he would have injured himself and forced himself to give up his tennis career.

The Kanagawa Prefectural begins as Eiichirō faces off against Araya's new underclassman Nishimura. Araya has told Nishimura all of Eiichirō's weaknesses from the year before, making Nishimura very confident in his chances of winning.

Eiichirō and Miyagawa face off in the second round of the tournament for their second match. If Eiichirō loses he knows he'll lose all chance of going pro. If Miyagawa loses he knows his path to become a pro will take longer and might force him to go to college first.

Coach Ryuhei Aoi decides to teach Eiichirō the importance of relying on instincts during a match instead of relying solely on data. In order to teach him how to play against a player who relies solely on instinct Eiichirō is forced to face off with Natsu.

Araya and Eiichirō begin their match in the Kanagawa Prefectural Final. At first both are holding serve and the score is at 3-3. However Coach Aoi realizes Eiichirō doesn't have the knowledge on how to deal with left handers since he's only played Araya once.

Eiichirō throws out a couple of unexpected dropshots in set 2 and begins to alter the speed of his game. After trailing 30-love to begin match 2 of set 2 Eiichirō is able to rally with this new strategy and pull off a break.

Araya and Eiichirō prove to be even and are both unable to break each others serve. Making things worse is there will be no tiebreaker., Instead an individual must win by 2 games.

The gang begins their third and final year of high school in different classes. Eiichirō and Natsu both realize their classes seem to be moving on without them as they are getting ready for cram schools and entrance tests.

The final door on the way to the All-Japan Junior, the Kanto Junior Tournament, is just around the corner. Eiichiro psyches himself up as he confirms his promise to his parents that he'll give up if he doesn't win the All-Japan Junior, and then he sets off with the other STC members for Chiba, where the Kanto Junior will be held.

The Kanto Junior Tennis Tournament begins at last, and Eiichiro is facing Yakabe Tadanori in his first match. Although he had watched videos of Yakabe's matches from a year ago, Eiichiro is bewildered by his opponent's much taller stature and completely different play style, and all the unexpected factors lead him to consider blanking all his mental data and starting from scratch.

Eiichiro is stunned by all the cheering Ide receives as their match begins. He struggles with the unpredictable plays of the intuitive Ide, but he recalls what he learned in his match with Natsu and concentrates on watching his opponent. Meanwhile, Ide also struggles to keep up with Eiichiro's constant changes in tempo and starts to tune out the world as he tries to focus.

Ide's remarkable ability to adapt instantly to everything has Eiichiro struggling, and reads his notes again to regain his focus. This improves his movements and leads to more impressive rallies, making the match even more exciting. Neither is willing to yield as the match comes down to which player can manage to hold serve...

Eiichiro thought he was successfully ignoring the crowd's roaring cheers for Ide, but his body was reacting to it more than he realized. The pressure of playing in front of a dramatic, Ide-centric crowd is troubling Eiichiro.

Eitaro, upon winning spectacularly in his fight against Ide, decides to go to the National Junior's. Coach Aoi explains that towards the end of the match, Eitaro was completely in the zone.

The match against Takagi begins. Just as Yukichi warned, Takagi's style is unique.

Even if it seems to lack etiquette, Takagi's play style continues to work in his favor by disupting his opponent's pace. Eiichiro struggles to deal with Takagi's tactics.

After beating Takagi, Eiichiro moves onto the semi-finals as does Natsu in the women's division. Eiichiro becomes aware of new feelings towards Natsu while watching her match.

The match has just begun and Eiichiro is already close to being in the zone. His excellent condition is reminiscent of his match against Ide; Eiichiro doesn't give Nabae a chance to fight back and soon takes the lead.

The match between Eiichirou and Nabae finally reaches its thrilling climax, and the former risks losing to envision his victory.

The game finally reaches its final stage. Eiichiro who desperately envisions a vision to win Nambae and is ready for a new strategy with the intention of losing.