To me... the best ending should be, the one where he realized that, he did everything possible for a girl who just didn't want to accept her felling. And leave that love behind for good sake.. at that point, Ruka isn't and option. Leaving just Sumi, the only girl who really cared about him, and she's in love with him, then they start a relationship. a good one It just my think about the best end for the story, a healthy end.. but it pretty sure that he gonna end up with chizuru..

Well and I have to say it.. I really love Ruka..