The overarching narrative of "Haikyu!!" culminates not with Karasuno winning the high school National tournament, but with the journey of its players into the professional world. Karasuno is eventually eliminated from the Spring High National Tournament. After graduation, the story features a significant time skip.
Shoyo Hinata, feeling he needs to improve all aspects of his game, travels to Brazil for two years to train in beach volleyball. This experience is transformative, forcing him to become a completely self-reliant, all-around player. Tobio Kageyama, meanwhile, quickly goes pro in Japan's V-League and earns a spot on the Japanese national team. Upon his return to Japan, Hinata joins the professional team MSBY Black Jackals. In a highly anticipated match, the Black Jackals, with Hinata, Atsumu Miya, and Kotaro Bokuto, face off against the Schweiden Adlers, featuring Kageyama, Wakatoshi Ushijima, and Korai Hoshiumi. Hinata's team wins, showcasing his incredible growth and proving he can stand on the same professional stage as his rival.
The series' true finale takes place at the Tokyo Olympics. Hinata and Kageyama are reunited, this time as teammates on the Japanese National Team, fulfilling their promise to one day play together on the world stage. The final chapter shows them playing against a team from Argentina, whose setter is none other than their former rival, Tooru Oikawa. The story concludes with Hinata and Kageyama playing against each other once again, this time for different professional clubs in Italy and Brazil, affirming that their rivalry and shared passion for volleyball will continue for the rest of their lives, forever pushing each other to greater heights. The ending reveals the futures of many other characters as well: Daichi becomes a police officer, Sugawara a teacher, and Tanaka marries the team's manager, Kiyoko Shimizu.