When I played Yves's route, maybe I was just too dense, or maybe it was because I didn't fall for him, but I honestly didn't really notice any BL undertones. It was only later when someone told me that there's actually some gay content in the game that I was shocked. After thinking back carefully, I realized there really is some one sided gay attraction. Everyone really has very different levels of tolerance. But I can also understand players who dislike this kind of story, because I have certain types of content I can't stand myself.