Ikuya Morisaki is a high school student and talented soccer player who captains his school's team. He shares a mutual romantic relationship with soccer team manager Azusa Kawahara, his childhood playmate who is one year older. His family resided in Los Angeles for four years, though the timing relative to his current school life remains unspecified.

As captain, Ikuya demonstrates leadership while maintaining a competitive dynamic with former teammate Takafumi Sugimoto, an ongoing rival. This rivalry extends beyond athletics into his personal life, directly impacting his relationship with Azusa. Their bond faces strain when Ikuya becomes increasingly occupied with unspecified after-school activities, creating emotional distance and discomfort for Azusa. The narrative does not depict further development or resolution of this tension beyond the established dynamic.