Bosujima operates as a "psycho diver," merging advanced tech with psychic prowess to infiltrate subconscious minds and resolve psychological trauma. His expertise lies in navigating treacherous psychic labyrinths shaped by clients’ histories and emotions, targeting the roots of their mental disturbances. When tasked with aiding Yuki Kano—a pop idol silenced by a cult’s mental manipulation—his dive into her psyche unveils occult forces warping her subconscious through sinister symbolism and latent threats. The mission escalates as the cult retaliates against those close to him, testing his resolve to prioritize duty over personal safety.

Embodying a noir-edged persona, Bosujima approaches cases with hardened pragmatism, blending smooth-talking assertiveness with brash, occasionally chauvinistic banter. Preferring action over deliberation, he confronts physical and psychological dangers head-on. A fleeting yet pivotal romance with Yuki’s manager complicates his detached professionalism, weaving emotional stakes into the mission’s tension.

His visual design features bold, unconventional hairstyles mirroring the series’ 1990s stylization, while the English dub layers his stoicism with introspective voiceovers reminiscent of classic detective monologues. The narrative confines his arc to the 1997 OVA’s events, centering solely on his role in dismantling the cult’s grip on Yuki without delving into his past or life beyond the case.