He should mention that "Okay, but you see me interacting with others even of same gender even casually, but acting jealous, though there's nothing between us."The reason why Miyamura doesn't feel jealous is because Hori doesn't even treat him as an equal or even a human being for that matter. She treats him like he doesn't exist or her victim to tease :> To the point where he gets trauma. Yea I don't think anyone would feel jealous, they would just pity the guy.. like they both said, he's treated as air..