I'm interested in this series, mainly to see how sexual it gets, not gonna lie, but mc constantly exposing his teeth like a retard at times when I'm not even sure it's possible is just shitty. It's like the mangaka didn't know how to make a gesugao without the teeth bit. I think it would of been better with warping the face a bit, but to be fair, that is hard to pull off. Mangaka is pretty good, just not good at illustrating insane characters while making them actual look insane. He nailed the desperation look with the princess tho.
tl;dr: Art and story are good, mc's face is pretty basic tho.