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The girl and her mother moved to their ancestral castle to spend the summer vacation, but they experienced a dream-like story here. When the bell rings at 12 o'clock at night, it is the most lively time in this castle...

Vampire? Soul-eating worm? Is everything the work of ghosts and gods or the unpredictability of people's hearts? After signing a contract with the devil but having his soul backfire, what kind of mystery does the strange disc hide? What are the meanings of mysterious letters and skull symbols? See how the tsundere loli leads the army of handsome men to the Yellow Dragon!

Vampire? Soul-eating worm? Is everything the work of ghosts and gods or the unpredictability of people's hearts? After signing a contract with the devil but having his soul backfire, what kind of mystery does the strange disc hide? What are the meanings of mysterious letters and skull symbols? See how the tsundere loli leads the army of handsome men to the Yellow Dragon!

Three years ago, the son-in-law who was despised by everyone has now returned from nirvana and dominates the world.