Story :  When he bites me, my body gets horny...

One day, Shinobu, a soft-hearted girl who loves children, takes Shion, a beautiful boy who was soaked in the rain in front of her house, into her care.
At night, Shion suddenly licks the blood off of Shinobu's finger after she gets a cut. Soon after, her body starts becoming really sensitive and horny..!
What's more, Shion transforms into an adult man right in front of her!
Adult Shion then starts to teach the already turned on Shinobu how to do "all kinds of things".
Soon after, Shion becomes fond of her, and begins to live in her house...