It Was Just a Clinical Trial

After being hit by the reincarnation truck, Erin, a pharmaceutical researcher, is reborn as an extra Baron’s young lady in a devastated romance novel.

“…This all happened because there was no contraception.”

Realizing she’s entered the very story she used to lament about—one where pregnancy and regret abound—Erin decides to use her knowledge from her past life and her current skills in alchemy to develop contraceptives and get rich.
‘I’ll change the tragic fate of the heroine, and help other women too. Paying off the family debt would be nice, too.’
With that mindset, Erin begins developing contraceptives, with only the clinical trial left to complete.

“If you can’t show more results, the funding will be cut off.”
“…Ten months! Just give me ten months!”
“Ten months?”
“Yes! That’s all I need!”

The Duke of Aston, who has been sponsoring her experiment, brings the shocking news that he will end his support.
Despite the urgent timeline, she can’t find any volunteers for the clinical trial.
In the end, Erin decides to become the subject herself, to prove the effectiveness of her contraceptive with her own body.

“Then let me do it.”
“What?”

But just as she’s about to carry out her plan—

“I absolutely cannot stand the thought of you messing around with filthy men out there.”

Her usually obedient assistant suddenly turns possessive, revealing a sticky desire.

* * *

“Ah, hnn……”

Erin trembled with overwhelming passion. She could feel the vibration from the man’s body pressed tightly between her legs; it was the sound of his low laughter.

“It’s not over yet, Doctor.”
“W-wait……”
“You said you need to show results for the experiment.”

Ash continued to move his hips, as if what was already filling her was not enough, and laughed again.

“Even if we repeat this dozens or hundreds of times, this medicine will prevent pregnancy.”
“Hnn!”
“Isn’t that what you need to prove?”

Her vision blurred, turning completely white.