I Awoke as the Demon Lord's Vessel, But I'm Not Giving Him My Body

He spent his entire life living for other people. Then he woke up in a body that was never meant to be his. In a world of magic, monsters, demons, and adventurers, a young half-demon finds herself possessing an absurd amount of mana, strange crown-like horns, and absolutely no idea why she exists. The body was created as a vessel for the Demon Lord. She was never supposed to be inside it. Now hunted, captured, and slowly drawn into a world she knows nothing about, she must learn to control the power she barely understands while uncovering the truth behind her existence—and the powerful beings who wanted her to awaken. But perhaps the greatest mystery isn't what she is. It's what she'll choose to become.