Akihito Akiyama was initially a human who became disillusioned with romance after a painful romantic rejection, leading him to avoid emotional connections. He found understanding in the vampire Seri Kikiyou, who shared his disillusionment, and they formed a bond. Seri’s flirtatious nature eventually sparked romantic feelings in Akihito, but her subsequent withdrawal triggered his mental decline into obsessive fixation, marked by stalking and relentless messaging. This culminated in a confrontation resolved by Kou Yamori’s intervention. Afterwards, Akihito requested that Seri transform him into her vampire underling, and she agreed, turning him into her offspring. While they maintain a master-servant dynamic, their relationship deepened beyond a typical underling connection. Physically, Akihito is tall and thin with black hair, a mole under his right eye, and thick glasses that corrected his poor eyesight. After becoming a vampire, his style shifted to darker, looser attire such as a dark blue shirt and black jacket, and he added two piercings in his left ear, projecting a more confident, relaxed demeanor. His personality retains core human traits like kindness, attentiveness, and philosophical insight during moments of clarity, but he also developed an intense thirst for blood, openly expressing urges to bite others, especially those with existing marks. While gaining confidence, remnants of his obsessive nature surface when Seri interacts with other men, driving him to discard reminders of his human past for new memories. As a vampire, Akihito possesses standard vampiric abilities: immortality, levitation, phasing through objects, superhuman speed, strength, durability, and accelerated regeneration. His relationships center on Seri as his emotional anchor and creator, Kou as a supportive friend, and Kyouko Mejiro as an enemy due to her attempts to harm him and Seri. His development involves reconciling his human vulnerabilities with his vampiric existence, achieving greater self-assurance while navigating the complexities of his bond with Seri.