As smutty as her one shots tend to get, Pandacorya-sensei always end up making them so happy and sex positive. It truly is the gift that keeps on giving.
I'm not sure if deceit, especially when involving prostitution, should be called "sex positive".
it is irrelevant in this case, she hoped senpai would go there but senpai went by herself to have sex with a woman, which kind of deceit is there? the only "trick" is that the kouhai was working there, but at the end senpai picked her.