Feeling the freedom of the great outdoors, you enjoy the company of a pure, innocent, BUSTY Fuuka-chan. But that's not all you are enjoying, now is it?
The protagonist reincarnates in another world with the power of support magic that can only be activated via sex. Knightess Kris is a pure girl, but if she is to have any hope of defeating the demon lord, she'll need the help of that magic...