Talk:Junta Nakao/@comment-5534769-20140512120048/@comment-397235-20140513002238

They aren't siblings (they don't have the same last names and look nothing alike). I think it's more implied there was some sort of mutual attraction thing going on (Naoya makes fun of him to Kouichi when Takako was checking up on him, commenting he was trying too hard, and went to get her ball for her later on; his death is what made Takako go insane in the later episodes). Not heard they were siblings though. That's a new one.