Board Thread:Questions and Answers/@comment-28196331-20161011050100/@comment-2600:1700:C080:3350:489F:AC25:7BBD:7883-20191219200710

So basically on how your phrasing it, Yuu is only attracted to Mika. Yuu doesn't have any attractions towards the girls that has been showed in the series, as the girls are attracted to Yuu. Yuu and Mika grew up together, Yuu got close to Mika emotionally. I don't know if Yuu ever blushed when he either seen Mika or heard Mika's name, but if we do see Yuu blush, then we can say he's a demisexual. I only seen the first season but I'm in the process of watching the second season