Achan fucked like in that one pic, skirt up on the side to expose her hips, no shoes, tits can be exposed or not (what ever you feel is better, idc and trust you as the artist)
She's enjoying it and stuff (but no ahegao)
Guy doesn't really matter as long as it's not some fat/ugly or old, you can just give him the male Little Busters uniform if you feel like drawing it