A quiet librarian gains an extraordinary ability after a science experiment goes catastrophically wrong, and instead of reporting it, turns it into a means of funding the woman he loves.
What is Human Vapor about?
An ordinary librarian is drawn into an experimental procedure that spirals out of control, leaving him transformed with an ability no one around him can explain. Rather than seek help, he turns the change into a tool, using his new power to pull off a string of bank robberies. The money funds the career of his girlfriend, a dancer he wants to see succeed, and the series follows how far he is willing to push an ability he never asked for to protect someone he cares about. What starts as an act of devotion edges steadily toward something far more dangerous, as the line between provider and criminal blurs with every job.
About the cast
Shun Oguri leads, with Yu Aoi, Suzu Hirose, Kento Hayashi, UTA, Yutaka Takenouchi, Motoki Kobayashi and Pierre Taki rounding out the cast. Shinzo Katayama directs, working in the crime-thriller register with a science-fiction premise layered underneath it rather than foregrounded — the fantastical ability exists mainly to raise the stakes of a very human story about love and desperation.
Context & significance
A South Korea–Japan co-production, Human Vapor pairs a pulpy genre hook with a grounded emotional core: a man doing something extraordinary for an entirely ordinary reason. The crime-thriller structure keeps the pace tight across its episodes, while the science-fiction element gives the show a visual identity that separates it from a straight heist drama. It sits at the intersection of three genres — crime, science fiction and thriller — without leaning too hard on any single one.
Watching Human Vapor on Ktime
Human Vapor streams on K-Time with Persian dubbing and Persian subtitles, letting Farsi-speaking viewers follow the story in their own language or with the original Japanese performances. A free K-Time account login is all that's needed to start watching, on a platform built around Farsi-first streaming for Persian-speaking audiences.