After a severe injury forces him to retire from boxing, Masaru spends his spring break focusing on rehabilitation and his personal life. While navigating romantic tensions with Maki and Akira, he meets Yumiko, a boxing enthusiast at the hospital who urges him to return to the sport. As Masaru attempts to move past his athletic career, he finds himself entangled in a series of passionate encounters that challenge his resolve to leave the ring behind.
Masaru's visit to a summer home takes a dark turn when Maki and Akira are targeted by violent thugs. With the help of Yukinojo, Masaru fights to rescue the women from their attackers, leading to a passionate reunion and a heartfelt confession of love from Akira.