Tonbo impresses seasoned golfer Igarashi with her unique style, playing solely with a 3-iron. Intrigued, Igarashi adapts his wedge with her 3-iron's grip and coaches her on its use. Teaching Tonbo reminds him of instructing his son, Rintaro, evoking regrets about robbing Rintaro of golf's joy.

Igarashi heads to Kagoshima to find a young golfer who can match Tonbo, who refuses to leave the island. Despite visiting several ranges, no one measures up. On the ferry back, Igarashi learns from Yoko that her niece is a junior tournament winner. Excited, he arranges her visit to Hino Island. Days later, a pickup truck arrives by ferry, with the girl sleeping in the back.

The typhoon hit Hinojima directly. At the development center, Tonbo and Tsubura took refuge. Despite the power outage, Tsubura practiced her swings and shared her feelings. After the typhoon, she gifted her 5-wood to Tonbo. Igarashi then found plans for a hidden hole on the island's golf course and took Tonbo to play it.

The single-hole course designed by Mr. Kuta on Warizumajima Island, with its beautiful scenery, was a challenging monster hole. Igarashi struggles to conquer it, while Tonbo impresses with creative shots, though Mr. Kuta has doubts about her use of a 3-iron for putting.

Igarashi sends Tonbo, now a high schooler, to stay at a golf practice range in Kumamoto run by a friend who trains junior players. When Tonbo tries a driver shot for the first time, the other students are puzzled by her skill. She soon gets a chance to practice at a nearby course, where she meets Hinoki Otowa, a talented junior golfer known for her performance at the Kyushu Junior Championship.

Tonbo and Hinoki hit the golf course for practice. As Tonbo unleashes bold, carefree shots, Hinoki’s view of her begins to change. Despite the strong winds, they exchange impressive plays. Meanwhile, Igarashi arrives with a special gift for Tonbo, who's just started her new life in Kumamoto.

After witnessing Tonbo's golfing style up close, Coach Hajime is determined to unlock her potential by entering her in the Kyushu Women's Championship. However, she must meet the eligibility criteria first. As Tonbo starts her new high school life, things get hectic as she learns to juggle school, going to the practice range, and practicing on the golf course to secure her spot in the tournament.

Though on the first day of the Kyushu Women’s Championship there were many players around Tonbo's age, she ended up paired with a housewife golfer named “Shima-san.” Her skills being just barely above the cutoff line irritates some fellow competitors. However, as the championship progresses, Shima-san’s unique approach to golf begins to influence her fellow competitors playing style!

On day two of the tournament, Tonbo, Hinoki, Tsubura, and Ema are paired up. Hinoki faces pressure from her father, Tsubura plays in her usual style, and Ema makes her comeback. Amidst this heated battle, Tonbo, as always, sticks to her carefree style. Then, driven by her father’s relentless push to be "number one," Hinoki makes a surprising move...

The night before the tournament’s final day, Igarashi arrives in Kumamoto. Noticing a change in Tonbo, he offers advice to draw out her strengths.On the last day, Tonbo, with her trainee caddie Nishida, faces challenging, windy conditions. Skillfully using the wind to her advantage, she climbs the leaderboard, making Hinoki, Tsubura, and Ema recognize her as a serious rival for the title.

On the final day of the tournament, Tonbo plays in her free-spirited style while Hinoki, Tsubura, and Emma close in, their competitive edges starting to show. Hinoki leads at the halfway point, but looks glum despite that. In the second half, Hinoki’s shot hits a tree branch, leading to an unexpected setback…