https://www.dlsite.com/books/work/=/product_id/BJ254023.html
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"Will you really sign a contract if I insert it...?" Training cheating sex with a life insurance lady

"If you do that to me, I'll feel weird again!"
Mizuki, an insurance saleswoman with the lowest performance in her career, is trying to redeem herself by visiting a male customer introduced to her by a senior colleague. But she never expected to be drugged while serving him... Mizuki finds herself in a mysterious basement, bound to a chair, and humiliated in a lewd manner. With her body without any freedom, she is stimulated by a man who crawls along her vagina....
"I don't like sex... but when you touch me like that..."
She is sucked on her nipples with her tongue, and on her lower half of her body, her fingers scratch the most sensitive parts of her pussy. Then, when a vibrator with a seal attached is inserted into her tender hole...
"Now, seal the contract yourself"... I can't do that!

Thanks for the synopsis and upload :)

I guess for part 2, she will want that "male customer's" dick...

Base +19, Fofotron +7, yupokamusi -8