A Better Tomorrow
무적자 (original)
Starring Ju Jin-mo, Song Seung-heon, Kim Kang-woo, Jo Han-sun, Kim Hae-gon, Tae-hwa Seo, Seo Tae-hwa, Lee Shin-seong, Lee Kyung-young, Lim Hyung-jun
It's a action & adventure and drama movie, and has a rating of 5.7 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Italy.