Colin, after being transported to another world, discovers he possesses the characteristics of a vampire: aversion to light, thirst for blood, and immortality. However, this world has no record of vampires! Is he the first of his kind? Without guidance or a system, Colin meticulously observes his body's reactions to various situations to understand his vampiric nature. He documents his findings: Sunlight reduces his strength by 30%; his throat, heart, and brain are no longer fatal weaknesses; only blood can sustain him; and he discovers someone has given him holy water! This story primarily focuses on a lordly struggle for dominance, with the vampire identity serving as a...