Actor Kim Woo-bin delivers refreshing action.

Netflix's "The Unofficial Martial Arts Instructor" (directed by Kim Joo-hwan) revealed its teaser poster on the 13th. Kim Woo-bin showcases a transformation never seen before. He appears with a uniquely bleached hairstyle.

The broken glass shards that seem to be shattered by his punch deliver a sense of lively impact. The tagline "Eradicating crime that threatens the world from the root" hints at his dynamic role.

"The Unofficial Martial Arts Instructor" is an action movie. The protagonist is Lee Jung-do (played by Kim Woo-bin), a martial arts expert with 9th dan in Taekwondo, Kendo, and Judo combined. He begins working as a martial arts practitioner under the suggestion of probation officer Kim Sun-min (played by Kim Sung-kyun).

The practitioners work for an institution that closely monitors individuals wearing electronic anklets 24/7 to prevent crime. Kim Woo-bin demonstrates real striking action skills by taking down criminals in one blow.

The teaser trailer also showcases Lee Jung-do's advanced martial arts skills. Kim Sun-min recognizes Lee Jung-do's talent and proposes that they work together. Lee Jung-do, in turn, reveals his quirky charm.

He asks, "Is it fun? Because what's fun for me is important," with a bright smile. This foreshadows the witty and youthful character Kim Woo-bin will portray. His relentless passion delivers a sense of exhilaration.

"The Unofficial Martial Arts Instructor" will be released on Netflix on the 13th of next month.

<Photo courtesy of Netflix>