Not only did he stick to his guns and not back down, he did so in such a way that there could be no confusion or misunderstandings, and he left her with the smooth ass line of “you don’t have to answer right away.” She really is cute though, no wonder he fell for her. And it seems she isn’t exactly opposed to the idea as a whole considering her reactions.
Wonder how long it’ll take until Miu figures out what’s going on, and I wonder how she’ll feel about it. It’s bound to be a little weird, but she strikes me as someone who probably already knew how Takumi felt. Doubt she’ll be much of a problem, honestly she’ll probably just wind up teasing her mom about it.