RIIZE's Wonbin shocked netizens with his extremely slender physique.

On a recent popular online community forum, one netizen posted various photos of RIIZE member Wonbin, where his slender physique and extremely flat abs were revealed. The netizen further wrote, "So frickin' flat...also his body is so sexy. I can't look at these in public." In the photos, Wonbin was mid-choreography, where he raised his arms to reveal his abs. 

Netizens commented:

"His body is so charming."

"Wonbin is slender, but his neck is thick and his shoulders are so wide."

"Wonbin, please maintain your slender body and don't bulk up!"

"His body must be made up of only bones and muscles...what's up with his abs?"

"And his visuals are super angelic...saw his no-makeup face,"

"He's slender, but since he did athletics his muscles are set in stone."

"Wonbin can't bulk up...his muscles right now are perfect."