Appel, a diligent scholarship student, arrives at an elite private high school, prepared to begin his new academic journey. However, he is met with unexpected chaos. The mysterious pink-haired twins, Glista and Glyde, appear, having developed a burrowing interest in Appel. They are sweet, bright, and worming their way into every aspect of his life. As his quiet routine starts to fall apart, will Appel discover the true nature of the twins to prevent his life from rotting away? The boundary between intrigue and madness is razor-thin, and the worm is already at the core of the apple.