Song Muzhou transmigrated into his younger sister's ABO novel, classified as an Omega. To conceal his body's pheromones and to continue being in the swimming team, Song Muzhou urgently looked for an Alpha (Lin Shuye) to mark him. Wait, you're saying that marking is just like having slept together? Marking also creates a sense of dependency? And more intimate interactions will lead to heats? No no no, I am not, I did not, don't come over here! Wait, how come you're also on the swimming team?