Nagisa Shiranami hails from Izumo City, where his family runs a restaurant. His childhood bond with Hiyori Suzumi formed through their fathers' relationship; her fisherman father provided seafood to his family's establishment. During early school years, Nagisa developed feelings for Hiyori after she defended him from classmates mocking his family's profession. His comment that dresses looked "weird" on her stemmed from an inability to express how cute he found her, creating lasting sensitivity for Hiyori. He participated in track and field alongside Hiyori throughout middle school, sharing training routines. After Hiyori moved to Tokyo for athletics, Nagisa remained in Izumo but later visited her there. Discovering her role as manager-in-training for the idol duo LIP×LIP triggered jealousy, particularly regarding their influence on her appearance and proximity. This prompted him to confess his longstanding feelings. Overwhelmed by balancing academics, athletics, and managerial duties, Hiyori declined a romantic relationship but affirmed their friendship and expressed happiness at his confession. Nagisa's initial hostility towards LIP×LIP softened after Hiyori clarified her lack of romantic interest in them. During LIP×LIP's tour stop in Izumo, he encountered them again. He openly criticized their performance desperation, comparing them unfavorably to the established group Full Throttle4, whom he admired. A subsequent challenge involving a run demonstrated his superior stamina, earning LIP×LIP's respect. They vowed to win his approval at their live show, leading to a more amicable, if competitive, understanding. Nagisa aspires to inherit his father's restaurant, planning to attend university in Tokyo for culinary training and restaurant internships to elevate the establishment to national recognition. Personality-wise, he is generally kind, patient, and well-liked, but exhibits hot-headedness and gullibility, as seen when he fell for LIP×LIP's teasing about his feelings for Hiyori. Following the main events, he and Hiyori eventually attend the same university. Later, Hiyori initiates a romantic relationship by confessing her feelings to him, which he gladly accepts. Physically, he is a tall teenager with short black hair swept left, brown eyes, and is often depicted wearing casual attire like hoodies and jeans. His name translates to "beach" or "shore" (渚) with the surname Shiranami meaning "white wave" (白波).