I wouldn't mind if there was no romance if they didn't very specifically promise there would be romance and didn't go miles out of their way to ensure the very title of the game and every piece of artwork related to the game didn't specifically and extremely strongly imply romance.
Quite a while ago I remember asking a question in some thread about the title and its connection to the main characters - whether it implied similarities to the "original sin" story in our common perception of it from the Bible. And they said is it's not the case. So the title doesn't promote any romances between main characters, but something else. The artwork is mildly suggestive, sure, but only mildly.
