Much more skin than that, low cut pants, more bulging. There aren't many hypersexualized male characters to use as an example. Most comics and games are made for men. The big rippling muscle men like Marcus Phoenix or Kratos aren't designed to be sexy, they're designed to play into the male power fantasy. Ivy is designed for straight men. Zwei is, too.
That's about as much skin as you can get without being in shorts. You don't have to be in shorts to be sexualized.
Yeah Marcus and Kratos aren't meant to be sexy. But Z.W.E.I. isn't like them. The only thing similar between those characters are... um... muscles?
So forget about comics and games. What's a sexualized man?
If there's a character with his sexy features accentuated, isn't that sexualized?
Go look at the characters in any otome game. He fits perfectly into one of the otome roles. Speaking of which, so does Patroklos. I bet you'd totally find a ton of yaoi if this game is popular enough.
I had this discussion in a different thread a while back too, so maybe I'm just dumb (likely).
But Z.W.E.I. is designed to be more than just an avatar to fulfill some teen boys' power fantasies if you ask me.