Akuma-kun (ONA)

Ichiro Umoregi is known to clients as Akuma Kun, a rare kind of prodigy with a calm stare and the unsettling upbringing of someone who learned morals from demons instead of neighbors. He runs a small consulting office where the requests are never normal, sudden deaths that repeat with impossible timing, a landlord who discovers a locked-room murder that should not exist, a rich man who wants the ultimate taboo done for him, summoning Satan, or a filmmaker begging for a cursed reel that ruined lives decades ago. Ichiro does not work alone. Mephisto III stays at his side as partner, handler, and the only person who can match his pace when a case turns from rumor to blood. Their investigations move through occult rituals, half-hidden organizations, and the quiet damage people do when they think no one will notice. Each job pushes Ichiro closer to a question he cannot ignore, who he really is, why demons treat his name with familiarity, and what kind of «ideal world» he is actually building by involving them in human affairs. When new allies and old enemies surface, including Strofire, a winged figure tied to the shadowy «Invisible School, ” the cases stop feeling random and start looking like steps in a larger design that has been waiting for Ichiro to grow into his role.