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At first, four swordsmen hired to bring back a runaway concubine appear to be competent mercenaries, but soon prove themselves to be a bunch of incompetent buffoons. Their leader, Yae-rang, only has one fighting stance: to drop his sword, make faces at the enemy and pinch his own nipples. Yo-i, is just as idiotic, but at least has a touch of humanity as he works as a mercenary only to earn money for his kid sister. The four take the concubine and her lover into custody, but also accidentally manage to somehow ruin the chance for the ghosts of five murdered courtesans to ascend to heaven. The warriors agree to kill the man responsible which will set the ghosts free, but they must be taught a few tricks by the ghosts as their existing martial arts skills are nearly useless.

How to Watch Romantic Assassin Legally and Safely

If you want to stream Romantic Assassin through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Romantic Assassin films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.