It Was Only a Clinical Trial

After being hit by the truck of reincarnation, pharmaceutical researcher Erin wakes up as the daughter of a minor baron in a ruined romance-fantasy novel.

“…This all happened because they didn’t use contraception.”

Realizing she’s entered the very tragic story she once lamented reading—full of pregnancies, abandonment, and regret—Erin decides to use her past-life knowledge and present-life alchemy to develop contraceptives and sit herself on a mountain of gold.

‘I’ll change the heroine’s miserable fate along the way, maybe even help other women too. And if I can pay off my family’s debts, all the better.’

With that resolve, she throws herself into research, reaching the final stage: human trials.

“If you cannot produce results soon, my lord says he will have to cut off the funding.”
“…Ten months! Please, just give me ten months!”
“Ten months, you say?”
“Yes! That’s all I need!”

But the Duke of Aston, who has been sponsoring her, threatens to withdraw support. Time is running out, yet no trial participants can be found.
In the end, Erin decides to use herself as the test subject to prove with her own body that the medicine works.

“Then I’ll do it for you.”
“…What?”

Just as she’s about to put her desperate plan into motion—

“I can’t stand the thought of you rolling around with some filthy bastard outside.”

Her ever-docile assistant suddenly turns on her, baring a sticky, dangerous lust she’s never seen before.

“Ahh, hhhngh…!”

Erin trembled under the splitting intensity. She could feel the vibration from the man pressed tightly between her thighs—it was his low laugh.

“It’s not over yet, Doctor.”
“W-wait…!”
“You said you had to show results, didn’t you?”

As if being buried inside her wasn’t proof enough, Ash drove his hips harder, chuckling darkly.

“No matter how many times—dozens, hundreds—this medicine will make conception impossible.”
“Hhhngh!”
“Isn’t that what you’re supposed to prove?”

Her vision blurred, then went dazzlingly white.