I kinda understand him too but he knew something has been troubling Haruki for so long I was wanting him to put the dots together and see it. I know he's only human, he had no way of knowing how trapped Haruki felt and getting that call before the date Haruki showed up late to was very upsetting. It's understandable his emotions were stronger than logic in that moment but I was still disappointed. ╥﹏╥ I'm glad he's reflected on his anger afterwards. Haruki will surely forgive him, he just has to find him.
I'm loving how realistic it is too, I hope the author keeps it that way. Realism in yaoi is so hard to come by, especially with yaoi containing rape.

I want Haruki to be with his senpai gosh (╯°Д °)╯╧╧