>>281677638
If Yuu was the troubled delinquent or a playboy type, it would be acceptable for him to have past lovers that supposedly didn't mean anything, but as a CF where the appeal is innocent pure love, he can't have anything with Hikari now that he did everything with another chick he went steady for a long time and lost all his first to her, and clearly was in love.
By Manga law he literally has nothing left to offer her, especially as a the awkward CF type.
Their relationship is doomed by now, he is soiled, which is not good for a CF.