Igarashi travels to Akureki to meet Mr. Kuta, the designer of the Hinonoshima golf course. He shares his past with Tonbo, who fears leaving the island. The next morning, Tonbo joins him willingly. Mr. Kuta warmly welcomes them and shows them a special one-hole course he created in the forest by a small pond.

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.

Mr. Kuta asserts, "Tonbo's golf style won't work in competition," and takes Tonbo and Igarashi to a challenging practice green. As Tonbo tackles the monstrous green all day, she starts to appreciate the kindness of Igarashi and Mr. Kuta.

Having decided to leave Hinoshima, Tonbo boards a ferry with Igarashi, bound for Kagoshima. On the ship, the two reflect on their time living on the island. Through playing golf with "Igaiga", Tonbo's world begins to broaden. As she starts to look toward the future, the warm presence of the island's residents, who have been watching over her, stays by her side.

With three holes left on the final day, Tonbo makes a charge, closing in on the leader. Meanwhile, Tsubura and Emma struggle to improve their scores, while Hinoki regains composure to recover. Suddenly, all four are tied, setting the stage for a dramatic finish. On the final hole, Tonbo's tee shot takes an unexpected turn, changing everything.