>>280074208
I'm pretty sure I got it from Yahoo Auctions, but it might have been Mercari.
Second hand stuff.
>>280074818
The only time their experience ever comes up is very briefly in the first doujin, in that they talk about having had sex before and that's it. It never comes up again in any way.
They have some experience and as soon as they fuck the MC they don't care about any other men.
>>280074988
Close. Yukina says it's the best dick and Ruri says she doesn't fuck raw right out of the gate. Their reactions to seeing Reina has given Keita a handjob certainly imply they've seen her handiwork before, but Reina never says anything indicating experience other than recognizing the smell of semen from Keita's tissues.
>>280075019
He loves it.