Shinya Yukimura, a first-year postgraduate researcher in information and computer science at Saitama University, applies scientific rigor to every facet of life, from computational problems to dissecting interpersonal connections. His medium bluish-gray hair frames dark amber eyes shielded by black square-rimmed glasses, often paired with a lab coat draped over a black shirt and blue necktie. Socially inexperienced due to childhood isolation and peer bullying, he maintains analytical detachment—until colleague Ayame Himuro confesses romantic feelings, triggering erratic heart rates and a joint experiment series to quantify love. Their collaboration spans measuring physiological reactions to proximity, assessing emotional intent’s impact on cooking results, and calibrating optimal conditions for romantic gestures. A forgotten childhood memory underpins their dynamic: young Shinya once lectured on logic to a hidden Ayame in bushes, unknowingly igniting her scientific passion. This past resurfaces as he employs methodical strategies in present conflicts, deploying slide presentations to dismantle antagonists threatening colleagues or to mediate disputes. Though initially blind to distinctions between platonic and romantic attraction, later experiments document elevated oxytocin levels during intimate moments with Ayame, signaling incremental emotional growth. His protective instincts emerge in high-stakes scenarios, such as orchestrating a junior colleague’s rescue from abduction using calculated risk assessments. Interactions highlight contrasts between empirical precision and social ambiguity. He bristles at senior colleague Ena Ibarada’s teasing, mentors undergraduates like Kotonoha Kanade with detached patience, and deciphers non-verbal cues through trial-based learning. His surname Yukimura (雪村), meaning "snow village," and given name Shinya (心夜), blending "heart/mind" and "night," mirror his duality—a mind steeped in logic yet navigating obscured emotional depths.