[Brothers War] the Rejected Sister Is a Magical Girl

Copywriting: What do you do when all the people you trust turn a blind eye and even push you to hell? Warm them and accompany them, push him into despair and then appear like a savior to save them. Let them love you to the core, wagging their tail at you like a dog, and then abandon them... Instructions for consumption: ① The thirteen brothers are twisted and collapsed ② The heroine's character is not dark but a bitch ③ The halo of the heroine Mary Sue ④ Digging holes for writing residue but not filling them [The author gave up treatment and let himself go]