Sex where
On a more serious note, i think it's kinda good that Hagu is building their character little by little, even in a small talk chapter like this one
That is absolutely true, but i don't think his parents would disapprove of her. If anything, they would probably be training hana to get on shinichi's level.
That, and the talk doesn't seem to be heading towards "she wouldn't be able to keep up, leave her for both your own good"
Even then...