concept Reverse upright straddle

https://civitai.com/models/54823?modelVersionId=59566 参考prompt：

here is a reference prompt:

1boy,1girl,reverse upright straddle, penis, vaginal, completely nude, open mouth, nose blush, tongue out, breast grab, arms behind back

需求具体动作请自行增减tag尝试

For the specific actions required, please try to increase or decrease the tag by yourself