After Gym Class

 According to Dashie, there's nothing better than a good hard buttfucking after a good hard workout. And Flash is more than willing to oblige, as she's pretty much the only girl at school who will let him do her up the ass.

Eventually I do plan on having Flash plow his way through pretty much the entire cast.

And just to be clear, Flash really is a good guy and an attentive lover. He is not saying or doing anything Rainbow doesn't like. She wants hard and nasty, so she gets hard and nasty.