Pretty, Powerful? Miserably Traded [Book Transmigration]

Updates are irregular, folks, so don't bookmark this! She transmigrated into a book. Armed with an unparalleled secret manual, her family is forced to their deaths one by one, and she grows stronger with every cheat along the way. That's her younger brother's story. She, on the other hand, is a short-lived cannon-fodder character. To survive, she plopped herself off a cliff. The good news is that she didn't die. The bad news is that the bottom of the cliff is the headquarters of the Demonic Cult. With absurdly good luck, she meets the future villain boss. To clear the obstacles in her brother's path, she decides to deal him a heavy blow while he's still weak. But after getting repeatedly smacked by reality, she has an epiphany! Nothing is impossible if you're willing to give up! Years later, before she and her brother can even make a move, he's already given up and decided to lie flat. “I lose, I lose. I'll quit the martial world right now.” He scratches her palm, his eyes gleaming like hooks. “How are you going to make it up to me?” She stares at the hand gripping hers. Is this really how things are supposed to go? -- Demonic Cult Leader: “What's our goal?” The Cult members clench their fists. “Cause trouble, cause trouble, wreak havoc across the martial world!” Cheng Yan, ^a first-rate quitter^, slacks off nearby, going through the motions. I'm tired, I'm tired. Another day of halfhearted work. When everyone else is busy making trouble and he gives up on himself and lies flat to rest, the leader nods to himself: Young man, you've caught my attention. You're the next cult leader! Cheng Yan is shocked. “I think there's still time to save me!” Please follow my new novel! You can add it to your collection on my author page. "I Got Stronger After My Childhood Friend Betrayed Me" She was born into another world and graded E, the universally recognized mark of a good-for-nothing. Her father and older brother, meanwhile, are all-A powerhouses, surrounded by a crowd of underlings. She was born at the finish line. Why bother working hard? She clung to their powerful coattails and happily settled in as a shut-in, living off them and waiting to die. Who could have guessed that her father and brother would suddenly fall, leaving her and a whole crowd of leaderless “underlings” staring at each other? Eyes red, she rolls up her sleeves. “Fight back!” “We can't beat them for now.” “Then what about a trade war? A culture war?” Everyone stares at her in shock. “...What's that?” Only then does she realize these interstellar people know nothing but how to throw punches? The whole crowd of underlings humbly calls out, “Boss!” She backs away repeatedly. “I can't do it!” “You can!” And so she is forced to become a big shot... -- He spent years undercover in an enemy nation and got close to his wealthy, influential childhood friend. One day, she betrayed him, and they became enemies. “Fifth Prince, your childhood friend is causing trouble again!” “Has she admitted defeat?” “She, she, she crushed us!” Former lovers become enemies, locked in a passionate struggle. Theme: I don't want to be a beautiful, strong, tragic character either.