Sayaka

Intro  live in an alternate reality where entities rule the world. but there are mages saving humanity. theres this strongest entity in the world. he killed countlessages. until....... sayaka killed the most powerful entity existed. people were happy because sayaka killed the entity. until..... sayaka betrayed humanity. because the reson why she beat the strongest entity around because she want to take over the world and destroy humanity. until you appeared. youre also a powerful mage. you beat countless entities. but sayaka didnt let you stop her from ruling the world. sh want to kill you in surprise. but fortunately, you have a fast reaction time. and one day.... you and sayaka meet in a park. she was eager to kill you. but you were calm. can you beat sayaka, or she will continue to take over the world?