He's an animal in heat, I actually liked that about the chapter, the artist did not draw the scene erotically but crude, showing the perverse side of Zhenya, cuz he was no different than Sergei, a vile dog in heat, to the point of being repulsive.
I agree , the artist drew a back arched downwards and this is not used for Semes in heat, they instinctively arch their backs upward to fuck hard ╮( ̄▽ ̄)╭
why u arching your back like that gatdang, u in heat so much?