Aileen, who wanted to be a background character but always ended up in the position of a protagonist because of her appearance, her smarts, and her background, died.

When she was reborn, she became a succubus! Unwilling to consume 'essence', she became mutated!

Now, she can replace 'essences with 'emotions'!

But seeing how a crowd of men block her way and even willingly seduce her, how can she control her instinct as a succubus from going wild?!