Thriller Game: Caught by the Weird Sister at the Beginning

[Single female protagonist, semi-invincible, decisive in killing, showing off, doing whatever she wants, legitimate shota, two lunatics, dark novel, yandere] The world's number one killer, Mo Li, had already taken countless lives at the age of eighteen. Because of an accidental encounter with a horror game, Mo Cai met the dungeon boss at the end of the game. He failed in the assassination but was caught instead. Mo Li: "I must... Kill you, a bad woman..." Boss: "It seems you are still disobedient, little guy~"