I Transmigrated into the Male Lead's... [Quick Transmigration]

She transmigrates into the role of the male lead's destined partner, his white moonlight, his own older sister, his sworn enemy, his childhood sweetheart... [Roommates] On her first day at a boys' school, her first roommate suspects she's a girl and demands that she take off her clothes for an inspection. Lu Ming decides to use violence to teach the idiot a lesson. Her second roommate casually walks around the dorm's common areas showing off his bird, shamelessly bragging, both openly and in private, that he's the most potent guy at the school. Lu Ming turns into "Doraemon," relentlessly hitting on him until he develops a "fear of men." Her third roommate is affected and pretentious, pretending to be gloomy as he leans on Lu Ming's shoulder and sighs about his radiant, 45-degree sadness. Lu Ming shoves him away with a slap, and the melancholy prince cracks a tooth. For a whole month, he doesn't dare show his face to anyone. Later, Lu Ming, the original heroine who is delicate and frail and constantly caught in compromising situations, transforms into the most untouchable delinquent king of the boys' school, a bona fide gay boss whom all the other boys avoid. [Stepsister] When Qin Huan's mother and her remarried stepfather take her to meet their blended family, three identical, handsome boys in the back seat give her charming smiles: "Hi, sis, you're so pretty! But there's no room left in the back, so you'll have to sit on my lap in a little while..." "What are you talking about? Of course a pretty sister should sit on my lap! Isn't that right, pretty sister?" "How can you two say such shameless things to her? Sis, I'm strong and have great stamina. You should sit on my lap instead!" Qin Huan: ??? There's something wrong with you guys. * Independent stories that are connected to one another. Most are set in the modern era. * There's probably a lot of male rivalry. Theme: No matter who you transmigrate into, live according to your own heart.