[Western Crossover] 818: My Sister with the Most Unusual Art Style

Confirmed daily updates at 8:00 a.m.! This story will officially go VIP next Monday, July 1! Three chapters will be posted that day, and updates will continue as usual over the next few days! XOXO~~ Since many readers have said they nearly choked while reading, here's a warning: don't drink or eat while reading! That's all~(*^ω^*) The story of a twenty-first-century shut-in who, with help from a ridiculous System, drives a bunch of people insane! Come on, come on, let's hurt each other! Grandfather, head of the League of Assassins: Let her go, hurry up and leave! Don't come back before Christmas! Her mother, one of the League of Assassins' leaders: So she can come back at Christmas, then? By the way, Father, do you remember today's December 22? Her younger brother, who gave up evil and turned over a new leaf in the Batfamily: My grandfather spends twenty-three hours a day arguing with my sister, and the remaining hour taking blood pressure medication to keep his blood pressure up... The big boss of the Batfamily: I feel like I'm going bald.jpg The other little birds of the Batfamily: Hahahahaha! The villains at a certain psychiatric hospital: Quietly hugging their small, helpless selves.jpg The whole story goes completely off the rails. Some parts may be OOC, just so you know! Theme: