"Harukana Receive" centers on Haruka Oozora, a high school student who moves to Okinawa to live with her grandmother and cousin, Kanata Higa. Haruka is tall and self-conscious about her height, while Kanata is petite and has a reserved personality. The two cousins reconnect after years apart, and their relationship becomes the emotional core of the series. Kanata, who once played beach volleyball competitively, has given up the sport due to a traumatic experience during a match. Haruka, unfamiliar with beach volleyball, becomes intrigued by the sport and convinces Kanata to teach her.

The narrative explores their journey as they form a beach volleyball pair, navigating the challenges of teamwork, communication, and personal growth. They join a local club and meet other players, including Claire Thomas and Emily Thomas, a skilled pair who become their rivals and friends. The series delves into the dynamics of beach volleyball, emphasizing the importance of partnership and trust. As Haruka and Kanata train and compete, they confront their insecurities and past struggles, gradually strengthening their bond both on and off the court.

The story balances lighthearted moments with emotional depth, portraying the characters' development as they overcome obstacles and strive to improve. Themes of perseverance, friendship, and self-acceptance are woven throughout the narrative, highlighting the transformative power of sports. The series also captures the vibrant setting of Okinawa, with its beaches and tropical atmosphere serving as a backdrop for the characters' journey. Through its focus on beach volleyball and interpersonal relationships, "Harukana Receive" offers a compelling exploration of teamwork and personal growth.