FSDSS-534 Help your best friend satisfy her lust

Yuta starts dating Yume, his first girlfriend. He's a virgin and she's a total nerd, so that's only fitting. But the thing is, after a few times of sex, she gets more and more sophisticated, her sex drive increases rapidly. So much so that it starts to become a problem for him.

FSDSS-534 Help your best friend satisfy her lust