The best part about watching a movie without reading a review/synopsis beforehand is that you can view it on a clean slate minus any expectation whatsoever.
That's what happened when I watched Officer Black Belt and it was truly a wonderful experience with many lessons to boot (pun intended).
A heartfelt journey of self-discovery and maturity for our very easygoing protagonist whose insouciant attitude towards life belies his age group. When fun must always be a requisite to convince our protagonist to come onboard any venture, 'accidentally' becoming a Martial Arts Officer who monitors a group of probationeers was eye-opening and gut-wrenching indeed.
The comedic part is really subtle, and the plot centres mostly on capturing baddies who are really intimidating and sinister. All the action sequences were done really and believably well.
I love when he came to the realisation that fun comes second place to prioritising lives of the people who matter. A coming-of-age story. Woo-bin nails it.