[When his back hits the couch, he releases a loud "oof!" before glaring at the one who threw him -- Mika. Guess... he shouldn't be surprised he was able to do that so easily, considering what he now is, but... for a moment, he'd been shocked. And for that moment, he can only stare as the blond begins lashing out at Zero.]
...Mik-
[He's hitting Yuuki. With a small grunt, he hurriedly moves to stand and rush forward, not even hesitating before throwing his arms around his friend. He attempts to pull him back, in spite of being... well... the weakest person in the room, in terms of physical strength.] Mika, wait! It's fine -- I'm fine! Just stop, okay?!
[All this because he'd cried...? What the hell, Mika?! Yuuichiro's burying his face in the blond's shoulder for a moment, though his ears are still taking in Zero's words. Those words... as much as he can't begin to know what Zero and Yuuki's world is like, he... almost wishes that he and his family had been born there. Is it really possible that there's a world where vampires aren't like the ones that they've known?
But... he can't say that he really cares about the vampires on Zero and Yuuki's world. He doesn't know them at all. But he does know that the two standing in front of them right now have been nothing but good to them, even if they did hide something from them. They took them in, fed them, even... offered to teach them and help them grow. They've done more for them in a matter of days, than...
...even their own parents did in a matter of years.]
... Mika, I feel like they're... telling the truth... [His voice is quiet, almost as though he's trying to prevent the pair from listening. Though, they likely hear his words. His next words are directed at Zero and Yuuki. It's something he'd wanted to ask on the first day, but never really got around to it. Now it feels even more significant.] Why do you... care so much about our happiness, anyway?