9 epsEpisodes9 episodes · 1–9 free here
Free on Back'n'Time
The story
Quick answer: 9 episodes, English original audio, and episodes 1–9 play right here tonight.
Grayson seeks revenge for his sister and is trained by a mysterious woman. Sent undercover into the Azure Syndicate, he rises to power after defeating a rival with one punch.
As the new leader, he exposes traitors, avenges Shane, crushes Blackstone Syndicate and Northern Wolves, and hunts the mastermind behind Ocean Gala to wipe out evil from the shadows.
- Episodes
- 9
- Language
- English
- Free here
- Episodes 1–9
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Questions people ask
How many episodes are there in Underworld: One Punch to Rule?
Underworld: One Punch to Rule has 9 episodes in total. Short dramas run about one to two minutes an episode, so it is an easy one-sitting binge. Episodes 1–9 play right here on Back'n'Time.
Can I watch Underworld: One Punch to Rule for free?
Yes — the first 9 episodes are free to watch on this page, no account and no sign-up.
What happens after episode 9?
Tap episode 10, or any tile with a lock on it, and we hand you over to the official app at that episode. If the app isn't installed yet, you'll land on its store page first. We don't host the locked episodes and we never ask for payment details.
What's Underworld: One Punch to Rule about?
The story section above has the setup without spoilers past episode 9.
What language is Underworld: One Punch to Rule in?
The audio is English. It was added to Back'n'Time on Oct 16, 2026.
Episode 10 continues in the app
You've watched the free part. Underworld: One Punch to Rule carries on in the official app — we'll open it at this episode.
Continue in the official appKeep watching 1–9