Nope they don't. He clearly says he was only going to make him (her) feel good and when he removed his pants is to jerk off.
If you bothered to read the chapter, Aizawa doesn't go all the way because he's starting to really feel something for Ichinose. But he's the kind of character who is after sex.
You can't expect him to change in the blink of an eye ╮( ̄▽ ̄)╭
How do you know for sure just out the raws? Plus I read the raws too (the Vietnamese ones until the 13rd chapter) and they didn't it. They were about to do it but they actually didn't.
But still, I don't even mind these straight secs scenes.
The reason I'm here reading this manga is because of the change of heart of the ML who's only interested in sex and in Ichinose as girl but then he gets deeply in love with him and even as guy. That's all ╮( ̄▽ ̄)╭

I was waiting for this chapter! (≧∀≦)
Finally, the MLs character development is starting now.