Nope, definitely K-League WE9 (SLKA-25321). I just can't find it at all and I'm not alone in that. Even tried hinting to it to a Korean YouTuber to drop an ISO. He wasn't keen! 🙃 So a gold star to whoever can find it!
Someone sell it from korean website, it's used though, idk if the site is legit or not, maybe some korean here can confirm.
http://itempage3.auction.co.kr/DetailView.aspx?itemno=C275152100
That price is f'in nuts for an old used game maybe because it's rare.