“Born with voices that could drive back the darkness,” the character Celine, a former K-pop idol, narrates at the start of Netflix’s new release “KPop Demon Hunters.” “Our music ignites the soul and brings people together.”

The breakout success of “KPop Demon Hunters,” Netflix’s most-watched original animated film, highlights how “hallyu,” or the Korean Wave, keeps expanding its pop cultural reach. The movie, which follows a fictional K-pop girl group whose members moonlight as demon slayers, amassed over 26 million views globally in a single week and topped streaming charts in at least 33 countries.

From K-pop and K-dramas to beauty products and e-sports, hallyu – which refers to the global popularity of South Korean culture – has drawn in millions of fans worldwide. But beyond entertainment, many young people describe how their engagement with Korean culture supports their mental health and sense of belonging.

We conducted interviews with 30 non-Korean........

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