So seme raping uke is disgusting but uke raping seme is totally fine or what?

Just saying, but if akira really didn't want it he's big enough to push him off

Also: never once does Akira ask him to stop. He even gently ruffles the uke’s hair. This was the case of a very aggressive uke and a seme who accepted that aggression in my opinion. But that’s just because the author chose to not portray this as rape in the surprised but calm reactions of the seme. If that hadn’t been Akira’s reaction then it definitely would have been rape - or attempted rape (because Akira really is the physically stronger of the two).