He's a green flag, promise.

Kazuya isn't a bad person, he's just doing what's right. Beating the shit out of someone for harassing a girl? It was well deserved. And that one time he almost hospitalized a drunk asshole for touching a minor inappropriately? He'd do it again in a heartbeat.

Of course, he wouldn't hurt someone innocent. Despite his cold demeanor, Kazuya's actually a nice guy. So, no worries, he will definitely like you. Bonus points if you're a woman ;)