Reborn as an Evil Female: The Snake Cub I Picked Up Is Getting Out of Line

【Two male leads + 1v1 romance + dark, unhinged top + selfish villainous bottom + younger love interest with a touch of raising him + equally matched leads + pretending to be weak while hiding one's strength】【Modern Beast World】 Yu Jin never considered himself a good person. So, to stay alive when a horde of zombies surrounded them, he calmly scooped up the supplies and abandoned his companions. Perhaps all the bad things he had done finally caught up with him: a zombie tore out his heart, and he died. Overwhelmed by resentment, he regained consciousness and first beat up a group of arrogant teenagers. Then memories that didn't belong to him flooded his mind, and Yu Jin realized he'd transmigrated! A villain like him transmigrating into the body of a villainous female? It suited him rather well. But was the little snake he’d picked up from a garbage heap really getting more and more presumptuous…? That night, Yu Jin kicked the little snake off his bed. “How did you get in here?” If he remembered correctly, he’d locked the door! The snake said miserably, “The window was open, so I climbed in.” Yu Jin: “…” Unless he was mistaken again, he lived on the fourth floor!