The black-bellied girl Situ Tian, ​​in order to change the outcome of her accidental death, contracted the ancient magic weapon Demon King Mirror. She needs to go to a different Honkai plane, complete the task, and get the blackening value of Qi Yunzi! In the first task, she Sadly, she teased out a black-bellied and evil devil king! After being eaten and wiped off by the big devil, she was bound to a soul mate contract, and she couldn't get rid of it ever since! The great devil king, when he falls in love with someone wholeheartedly, what greets her will be a love that will destroy the world! A certain evil, domineering and powerful devil king: Tian Tian