I don't understand why give Ugetsu a female romantic interest. Honestly I hated it. And th...

I don't understand why give Ugetsu a female romantic interest. Honestly I hated it. And that thing about Mafuyu sister having a twisted personality I don't understand either. Why not give him a male romantic interest with another personality type? A type that complements Ugetsu. But no, the author's solution was to create a generic boyxgirl pair. I'm sad because Ugetsu had the potential to have a great side story. ┗( T﹏T )┛