The System Forces Me to Be a Heartbreaker

Mo Xiaozhu has recently been reading a messy, melodramatic novel. For the first twenty chapters, the two best friends are closer than lovers; for the next twenty, they turn against each other and fight over a scumbag. Mo Xiaozhu ships the best-friend couple, so the story sticks in her throat. Furious, she curses up a storm in the comments, until... Until she transmigrates into the novel as its vicious female supporting character. Mo Xiaozhu decides that the couple she ships has to get a happy ending. So, with the goal of getting the best friends and the female lead together, she accidentally ends up on the male lead's route! Best friend: "You have to choose one of us today, her or me. Which one do you want?" Female lead: "You said you would love me. You promised. You can't abandon me." Mo Xiaozhu: "System, something's not right here. Can I run away???" The System is enjoying the show. Mo Xiaozhu: "..." Please note before reading: 1. No polyamory, one-on-one romance 2. Lighthearted at first, with some angst later Theme: Break free of constraints and bravely be yourself