Please don’t spread misinformation. He’s raped in the very first chapter.
I guess it's questionable consent. It's kinda hard to tell. A lot of japanese Manga have the bottoms saying "no. Not there" etc a lot. I can see where you are coming from but I believe that especially because he later says no clearly,the scene in chapter 1 wasn't completely non con.
But the mc enjoyed it overall. Check the aftermath.
There is consent people spreading misinformation he didn't put it in and uke still scared so seme will wait for him first chp was little touch that could consider as sexual harrasment but not rape
for immediately stopping after consent was withdrawn. Don't see that often