Ryo Amakusa is a 26-year-old office worker and Deputy Chief with blond hair swept left, hazel eyes, a toned physique, and broad shoulders. He typically wears a blue suit over a light blue button-up shirt and red tie. Initially depicted as a womanizer with a history of being "loose with women," his personality shifts after meeting Ichika Arima. He pursues romantic interests persistently but shows kindness by assisting her when needed, displaying jealousy when observing her interactions with classmate Kai Tamaru. His background involves familial conflict with father Zenji Amakusa over career choices and broken trust, leading Ryo to avoid home prior to knowing Ichika. His relationship with younger sister Rio was distant, marked by her avoiding eye contact during arguments. Their dynamic improves through shared connection with Ichika, increasing communication and family time. Ryo’s story begins when Ichika prevents him from falling down train station stairs during an anemia episode. She offers her lunch box, which he eats despite hesitation. Learning she is Rio’s friend, he attempts gratitude through inappropriate proposals like offering a kiss, which she rejects—sparking his romantic pursuit. His courtship involves sending daily gifts via Rio, including chocolates and roses. When Rio tires of relaying items, she provides Ichika’s address. Despite Ichika’s phone request to stop flowers, Ryo continues while admitting he cannot suppress his feelings, initiating nightly calls to hear her voice. Key developments include interfering with Ichika’s interactions with Kai, such as preventing book lending. During Ichika’s Okinawa school trip, updates from Rio trigger jealousy about Kai. Workplace interactions reveal complexity when colleague Arie Matsushima develops feelings for him, prompting self-reflection about societal views on his age gap with Ichika. External challenges arise: Masuda confronts him about inappropriate pursuit, and Zenji admonishes him for targeting Rio’s classmate, demanding he "grow up and take responsibility"—though Zenji later softens after witnessing Ichika’s positive impact. The narrative culminates when Ichika confesses mutual feelings at their first meeting’s train station. Ryo commits to waiting until she reaches adulthood and assures Zenji he will "properly take responsibility." Throughout official media, Ryo evolves from socially inappropriate behavior toward greater self-awareness regarding consequences, though his core persistence in pursuing Ichika remains consistent.