Transmigrated as a Side Character, But Everyone Falls for Me

Yu Huan thought she had it all figured out: transmigrate as the male lead's disposable ex-girlfriend, enjoy his money while it lasts, then cash out her breakup fee once the heroine shows up. Easy, right? Except the heroine never arrives. Now she's stuck as a stand-in lover who was only supposed to exist for three chapters—but somehow, the male lead won't let her leave. Across apocalyptic wastelands where she's a zombie girlfriend waiting to be mercy-killed, countryside romances where she's the gold-digger destined to dump him, and cultivation worlds where she's the scandalous junior sister of…