Rin Suzuki stands 196 cm tall as a second-year student at Kawanuma West High School. His muscular build, brown eyes, and short brown hair create an imposing, intimidating appearance. However, Rin possesses a gentle and respectful personality, often leading to initial misunderstandings. He is characterized by kindness and loyalty. Rin maintains a long-standing friendship with Ichiro Sato since junior high, proving reliable when Sato encourages him to socialize more. His interactions frequently result in accidental compromising situations with the school's art teacher, Mayu Matsukaze, though Rin consistently avoids taking advantage. Their connection originates from an encounter three years prior to the main events, where Rin helped Mayu reach a teacher certification exam on time. Mayu later recognizes him as her past helper when they reunite at the school. Their dynamic evolves through recurring accidental erotic situations, with Rin remaining considerate and protective. Mayu initiates their first kiss while Rin is asleep during a forced proximity incident orchestrated by another teacher. Rin holds traditional values regarding physical intimacy, expressing to Mayu his intention to wait until marriage. This stance contrasts with her expectations. Their relationship progresses, culminating in marriage approximately two years after their school reunification. Following marriage, Mayu is depicted as committed to Rin. As a supporting character, Rin's development primarily occurs through his romantic arc with Mayu. His role expands to include interactions with other faculty members, such as Kana Kojima, who supports Mayu's relationship with him despite the teacher-student dynamic.