Bukida, also known as Kida Fumio, originates from a tragic school existence as a supernatural entity. His repellent appearance incites universal rejection and disdain from peers, resulting in severe isolation. He fixates on forging romantic bonds, primarily through obsessive stalking of female students like Matsuko. Despite explicit rejection, he deludes himself into believing his feelings are secretly reciprocated. This cycle of misinterpreted affection and forced advances defines his behavior.

After perishing in a traffic accident, Bukida returns as a sentient corpse, showcasing supernatural persistence. He confronts Matsuko posthumously, declaring love that transcends death. This reveals his core drive: a relentless, supernatural obsession to fill an inner void through coerced romance, disregarding consent.

His pursuits unfold across episodic encounters, fixating on girls embodying varied personalities—a universally kind individual, a disinterested one, and an initial rejector—yet each culminates tragically for the victims. He deploys supernatural means like post-death reappearances or "weird magic" to impose his desires. Consequences include psychological torment, graphic suicides, or fatal accidents.

One narrative deviation features a girl developing genuine feelings for him first, introducing a potential shift. Outcomes still delve into dark themes. Later interpretations suggest possible maturation in his understanding of love, hinting at growth beyond obsessive patterns, though this remains ambiguous.

Visually, he exhibits distinctly unsettling features—often deemed creepy or ugly—with black hair amplifying his unnerving presence. His design reinforces his horror entity nature. He originates in the manga "Bukita-kun," where episodic chapters explore obsessive love and supernatural horror. Expansion attempts include a crowdfunding campaign for "Shin Bukita-kun" to extend his narrative beyond the manga’s conclusion, though funding goals were unmet.