Instead of this faggot speaking perfect Japanese it would be far more fun if they employed a translator convention:
>Speaks with Sorata: Sorata speaks broken as fuck Japanese but gets the point across: implying he's speaking in poor English
>When speaking with Tihiro, Masiro and Ryuunosuke, they all just speak in fluent perfect Japanese: implying those three can just speak fluent English which is believable, maybe give Ryuunosuke and Tihiro some weird accent
>When speaking with Nanami and Misaki: Rita instead speaks in broken Japanese, implying they are now speaking Japanese and Rita is just using whatever shitty Japanese picked up from Masiro to get a basic point across.

Would be far better.