Tsuneo Suzukawa studies marine biology at university, supporting himself with part-time work while caring for his disabled grandfather. His surname blends the characters for "bell" and "river," and his given name translates to "constant man," echoing his steadfast disposition. Tall and slim, he has medium-length black hair and light green eyes. A lifelong passion for the ocean defines him, anchored by his dream to dive in Mexico and observe wild clarion angelfish. He first meets Kumiko Yamamura—later nicknamed "Josee"—when her wheelchair careens down a hill. Tsuneo intervenes, preventing further harm and meeting her grandmother, which leads to him becoming Josee's caretaker despite her paraplegia and limited mobility. Early interactions reveal Josee's defensive hostility, but Tsuneo responds with unwavering patience, gradually building trust. Determined to expand Josee’s world beyond her home, he modifies her wheelchair with a skateboard for secret city outings. He later aids her grandmother in securing social welfare, enabling home renovations for accessibility. His bond with Josee evolves from caretaker to companion as he nurtures her talents in writing and illustration, fueling her confidence. Tensions erupt when Josee discovers Tsuneo’s romance with Kanae Kishimoto, a fellow student, sparking jealousy. Josee’s grandmother, seeking to protect her, demands Tsuneo end his visits. After the grandmother’s sudden death, Tsuneo rushes to Josee and moves in. Their relationship deepens into romance and intimacy, yet strains surface from external pressures—including Kanae’s accusation that Josee manipulates Tsuneo through her disability—and internal conflicts. Roughly a year later, they separate. Tsuneo moves out permanently, confronting profound emotional turmoil in a final encounter with Kanae where he accepts the separation’s likely permanence. Personality assessments diverge: one identifies him as an INFP Myers-Briggs type and Enneagram 6w5 ("The Loyalist"), emphasizing loyalty, security-seeking, and responsibility. An alternate view suggests ISTJ, highlighting his reserved demeanor, methodical approach, reliance on facts, logical choices, and preference for structure. Both note his kindness, reliability, patience, and self-sacrifice, evident in his care for Josee and his grandfather. Yet he occasionally buckles under emotional surges and grapples to comprehend perspectives starkly different from his own, like Josee’s isolated worldview. Following the separation, Tsuneo pursues his original dream, studying marine biology in Mexico. Returning to Japan, he reconnects with Josee, continuing their relationship.