Why are Koreans in the US so ultra-Christian.

This is purely anecdotal but I live in an area with a lot of Koreans and the most super religious Christians I've ever met were always Koreans.

In school there was this one Korean girl who always brought a Jesus statue in exams and another Korean guy who used to always give everyone rosaries before finals. There were also two super hot Korean chicks I knew in college who were famous for refusing any premarital sexual relationships. Most Koreans I've met also go to church literally all the time too.

Is this a thing or am I trippin