Why are you all calling it rape? Maya was on cloud nine, like he really don't care if Nemu did whatever he wants to him.. Understand that's rape is when one side didn't consent the other side.....
To all the other comments, here is my opinion: It is rape if one party doesn't want the other one to do it and would hate it if they did it, regardless if they are dating or not. So in this case it is not rape, because he was fine with it after he woke up. Also, this is fiction, so read it like it's fiction.