Satisfied Revenge

there is a girl named Ayako. A Japanese student at school "shinkora akademi high" . She is in the school for 3 years and she was excited to start her 4th year in grade 9th. later she got surprised that her best friend Ami, who was a long distance friend of her was also gonna start in the same school with the same grade. Ayako was excited to start her new class with her best friend until, she saw a different change in her. she was confused by how her friend Ami has changed and then Ami did something to Ayako which made Ayako to get a revenge on her. which will satisfy Ayako [•-•]