Same thought.
I think only till the part of foreplay can be considered as consensual while the following one is not since he's drunk and they didn't even agreed on that beforehand. If you actually put this situation in a hetero rs it would really be rape. Even though he agreed, since some peeps have really low tolerance with alcohol and eventually don't really mean or unconscious of their decision the moment they are drunk. I know a people like that so I can say. And this situation can actually be said as rape if this is not fictional.
They've been kinda using the excuse of this being a BL to somehow justify the flow of the story with almost natural rape/ sexual harassment scenes.
Btw I just wanna say that noncon or dubcon don't really bother me that much to the point I despises it. Since Im fully aware this is fiction but if knew someone doing that irl that's a different story already.
Anyways it would still have been better if more authors can execute or write BL with good flow without adding rape/sexual harassment in the story unless its really necessary for the plot.
if he's under the influence... wouldn't it still count as rape? (-。-;
sorry for ruining the rest of the comments lol im so uncomfy