Hahaha, how funny people here that are just overthinking, thinking the author "hid the hints" about Haruka having sex with Kouta.
Just stfu, please, that never happened. Thye've just kissed. Why it's so difficult to people to admit that sometimes authors can screw up their story? Stu-Hiro just did that.

I'm sorry to give a reply to such an old thread, but I'm just pissed that I wasted my time reading this cr*p. Thank god by the time I read, the series was completed already and I could skip a lot of useless stuff after chapter 40ish. But I can't even begin to imagine if I was following the chapter as they were released back then.