...?

that wasn’t rape, it was just drunken sex

Oh, many readers don't like if you point out that the relationship in their favorite uwu manga starts with r*pe.

It was tho since our mc said it himself in the very first chapter

i believe it might be a mistranslation since it was pretty much consensual but one was drunk, drunken sex isnt always rape.

Well I do agree that drunken sex isn't always rape, but he says it more than once so it's also not consensual. So if anything it's definitely dub-con.