it's Stockholm syndrome. In the end, Haruki didn't manage to escape from Hikaru's shadow. He became impotent because of the trauma also the guilt of hikaru's mom death. it likely fair & square but when he saw hikaru once again, he thought to fix all the mess up between them. i wouldn't say either love or guilty. he realizes that only hikaru understand & accepting all about him eventho he became impotent. that's why he rejected that man. he knows only hikaru able to accept him the way he is. so basically both are broken but they need each other to live even with or without love. they are inseparable.
Dyamm that is such a good analysis. Thank you!!!!!! I finally understand it.
I did not understand the ending... so he ended up with the brother but he has become impotent? Like does he like the brother now?