One day, the protagonist, Kannagi Kouya (※surname and first name can be changed), was approached by a transfer student and classmate, Fuchigami Fuyune, with a strange proposal.
“I want you to ruin Mikumo Suzuka, another classmate of ours. In exchange, you can do whatever you want with my body, even though I don’t like it.”

It was an outrageous offer, but deep down, he found it intriguing.
The protagonist had long been aware of his own twisted desire to defile women he found attractive. He’d already had his eye on both Suzuka and Fuyune.
Still, he wanted to graduate from the academy without any issues.
That was his priority.
While the offer seemed convenient, he couldn’t shake the suspicion that it might be a trap designed to set him up.
Even if it wasn’t, getting caught would almost certainly ruin his life.

‘It depends on the reason and conditions. Normally, this would be a crime, but if it somehow helps someone… Maybe I should at least hear you out…’

He was about to respond with that when—

“Alright, I’ll do it.”

The words left his mouth before he could stop himself.
Fuyune smiled at his answer, and he was certain she had somehow forced him to agree.

Not wanting to be outdone, he flashed her a smile of his own and repeated his acceptance, this time of his own volition.
For a moment, Fuyune looked surprised, but she quickly laughed, and the protagonist joined in.

He still couldn’t figure out her true intentions, but he was thoroughly intrigued.

“I’ll play along… After making her regret this thoroughly, I’ll make sure she’s happy forever.”

[Translated from dlsite]