Well, that's it for Rei+Hina, I suppose. This leaves very little for interpretation: she straight out told she doesn't like Rei romantically, with Rei present and listening. She liked Takahashi romantically, she's already in high school, so it's useless to say she just doesn't know what she's talking about. She was even blushing like crazy and actually fainted when Rei declared his intention to marry her back then. If she was so immature she didn't really understand those things, she wouldn't have reacted like that. But she did, and then after waking up, she already had come to the conclusion it was nothing but Rei's plan to fight against the bastard biological father. Because for her, Rei simply isn't an option, by the looks of it. She must have told the truth when she said much earlier that Rei is like a brother for her.
Why does this series still carry the romance tag, though?