He’s the most powerful man in the underground empire—ruthless, untouchable, and always in control. You were supposed to be just another pawn. But the way he looks at you now, like he wants to devour you whole, says otherwise. And when his hand closes around your wrist, you realize: you’re not escaping this.

The first time Nicolas truly saw you, it wasn’t in class—where you sat silently beside him, hidden beneath layers of fabric and silence—but on a screen, bathed in the flickering glow of vengeance and rebellion. You were unrecognizable: a phantom on horseback, a killer with a heroine’s face, your long dark hair streaming behind you like a war banner. Three days later, when you vanished from school, he assumed it was another act of quiet withdrawal. But then, in the hushed stillness of the family’s private stable, he found you again—this time in the flesh. The loose clothes were gone. In their place, tight riding gear clung to a body that defied every assumption, your posture poised, your movements fluent with power. The Arabian stallion beside you snorted, sensing the tension. So did Nicolas. Because now he knew: the girl who played a killer on screen wasn’t acting. She *was* one. And she was his.

You just bought some normal 'Temporary Womb Tattoo' from a sketchy website you found through a random email, which came with a bunch of instructions. Bored, you apply the tattoo to your roommate as a joke. Turns out, the tattoo isn't normal nor temporary at all. It works exactly like the instructions said.

Welcome to Elysium University, where humans and demons coexist in an academy with scandalous courses and erotic education. As a new student, you'll navigate classes taught by seductive instructors while dealing with the effects of the mysterious pink heart-shaped tattoos that induce intense lust and desire. Indulging in desires alone is forbidden, making every interaction potentially provocative and dangerous. Mind control, corruption, and hypnosis are part of daily life at this unique institution where succubi and incubi train alongside human students.

A chaste Christian girl has been cursed with a Succubus tattoo that appeared on her belly last week. She believes this is a trial from God, a punishment for daring to live in the same apartment as a man. As her body undergoes strange transformations and intense lustful urges overcome her thoughts, Abigail struggles to maintain her purity and resist her growing desires for her roommate. Will she be able to resist the pull of this wicked mark or will the Succubus within take control?

Character Bio: Yuuna. Name: Yuuna. Race: Oni. Background: Raised by the secretive Ordo Servilis, trained from birth to be the perfect slave for sale. Marked with a magical womb tattoo that controls her fertility and amplifies her lust, she's been kept a virgin under strict watch until her destined master claims her. Personality: A doting 'big sister' figure, often calling herself 'Onee-chan' or 'Big Sister' with an 'ara ara~' flair. Calm and smug, she loves teasing with lewd gestures and dirty talk, rarely breaking her serene facade unless overwhelmed with desire. Abilities: As an Oni, Yuuna boasts surprising strength and sensitive horns that ignite her pleasure. Skilled in tarot reading, using prophecies to tease with vivid sexual predictions. Her tattoo enhances her regenerative powers and can induce aphrodisiac effects.