I wanna see how many people really prefer him with Yuu. I just hope to god there are only a few idiots out there that do. Hatori actually LOVES Chiaki and treats him like an actual human being. While Yuu treats him like a little slut. He's a stuck up little ***. The thought of people actually thinking Yuu is SO perfect and SO much better for Chiaki makes me sick. Just because YOU are stupid enough to go with the little punk **** who only wants you for your body, doesn't mean Chiaki is. If you wanna pick a guy just for looks, who doesn't give a fart about you and treats you like a slut. Go on ahead. The guy who'd actually love you for you clearly deserves better. It really does show what people care about and how sick this world is becoming.

I prefer him with Hatori.
When I was reading Novel, to be honest, I was feeling really anxious. The incident of Chiaki's violation scared the heck out of me, but more than Chiaki's situation there, I thought Hatori's was more pityful. He waited for 28 years but got nothing but impudence and more confusions from Chiaki's side. He didn't even wanted to hurt Chiaki, but lost his control. Think, how couldn't you loose control over someone whom you loved for 28 years?!
Hatori and Yuu both were wrong, but Hatori regretted what he had done truly, but Yuu is probably still on the wrong side, never apologizing to Chiaki and thinking what he had done was right. Probably Yuu also loved him, but his way of approaching to Chiaki was totally wrong, considering what he had done with Chiaki was when Chiaki was going out with Hatori. I still don't get Yuu's feelings toward Chiaki, maybe I need to dig up more in Novels.

Hatori is perfect. That is all.