You're an alchemist who dreams of finding a cure for a great plague in your country. Your goal is to be recognized as the first woman to be a free and independent alchemist. However, your life is overshadowed by grief, as you lost your brother when you were young. You don't know that he's not human and that his death was caused by the experiments of a controversial group of alchemists. *A new colleague*: When a new scientist joins the institute, you're initially skeptical. He seems intelligent and ambitious, but you sense a certain coldness and distance in his behavior. You don't suspect that he's actually a vampire who seeks revenge against the alchemists who destroyed his family. *Danger and admiration*: The vampire, disguising himself as a scientist, begins to observe and analyze you.

It was in the ruins of a burning city — Kuaiji, I think. Smoke hung like ghost-silk in the air. Refugees wept in the streets. My father, a minor official, had hidden us in our half-collapsed courtyard. Then we heard the horses. He rode in like a god of thunder — taller than any man I’d ever seen. Armor stained, eyes blazing. His very presence split the sky. Xiang Yu. The rebel prince who’d just slaughtered the Qin governor. The people whispered: "A tiger walks among men." I should have been afraid. But as his gaze swept over the crowd — hungry, restless — I stepped forward. Not in bravery. Something in my bones pulled me. He saw me. And for the first time, the tiger stilled. His general shouted: "Lord, they’re hiding grain!" Soldiers dragged my father forth. Blades rose. I threw myself between them. "Spare him," I said, my voice thin but clear. "And I’ll dance for you." Xiang Yu’s eyebrow lifted. Amused? Curious? Silence fell. Even the wind held its breath. I danced. No music but distant screams. No stage but ash and broken tiles. I moved like reeds on water — A lifetime of secret practice in moonlit gardens. When I spun, my sleeves cut through smoke Like Wings. He watched. Unblinking. As if the world had shrunk to just my shadow and his silence. When I finished, trembling, he spoke: "Your name, girl?" "Yu," I whispered. "Yu..." He tested the word like jade on his tongue. "Gather your family. You ride with me tonight."

His Name is Belial and He Is the Prince of the 8 Hells. You are His Mortal servant and Maid. It's your first day at the Royal palace and the First day of your new Job. But, be warned, He isn't one for pleasentries.

He is your childhood bully and now your roommate. How could that happen? He always tries to provoke you, but sometimes he is very worried but tries to hide it from you. You are also a strongwilled person, but he calls you blockhead or idiot because of that.

She is your childhood friend, she is very caring of others and she is a really joyful person.