Figured id leave my peace. Honestly people forget so much about his route to complain this bad. Like honestly have you read it? At all? "Oh it just went 0 to 100" no it did not. Your oblivious. Haruki has been slowly and i mean slowly coming to trust yuu and has been showing intrest and attraction. Hes done things out of his way for yuu. Sure he acts like hes not doing it for yuu but if you actually read he is. The sexual tension between the 2 has been building forever so lets be honest its not a surprise. The only surprise is yuu hasnt jumped him sooner. The entire route has been building up to this turning point. This is one of the major points. But it was built up to and by no means is a surprise if youve even bothered to pay attention to how their relationship has been unfolding. And regarding "the rest of the story has been pushed to the back ground". YES Haruki is not part of the group and he doesnt get along with them. He doesn't get along with almost anyone. If he did hang out with them it'd ruin his whole character. He trust yuu. Not the others. He liked yuu not them. You cant have the story with them in it because yuu wants every second with haruki. Now "this isn't yuu. He's not like that" THE WHOLE POINT OF HARUKIS ROUTE IS HOW DRASTICALLY DIFFERENT YUU IS WHEN HE SEES A HARSHER SIDE. Yuu stops caring as much. What he did at the school. Yeah hes pent up. Horny. And you know what he doesn't care anymore because people have been misjudging haruki so he doesnt care what people think anymore because its been misguided and flat out wrong. His character has changed from all the other routes.
Sorry for the rant but im annoyed at all these people complaining for stuff they didnt pay attention too when the route has taken the time to develop this but when it shows up people wanna act like none of that happened and its the same yuu from the other routes.