Have you ever fell asleep in class, staring at the frozen window where dawn is just beginning to tinge the sky crimson? That frosty haze that appears on especially cold mornings lingers before your eyes. Leaning on your hand, you warm yourself by the radiator, compensating for the night's lack of sleep with a five-minute snooze. Everything around feels familiar and safe, but are you truly sure? The snowfall outside intensifies, promising nothing good. Return home with your friends and look back often.

In this visual novel, you will take on the role of a young person of unspecified age and name, leading the routine life of a homebody. As you read, you'll be drawn into a seemingly carefree high school story on one hand, and on the other—into a series of mysterious and inexplicable events. Will you trust your friends or your paranoid suspicions? The choice is yours.

Beyond the classic choice system, the game features deeper mechanics for interacting with characters: inputting numerical parameters and mini-games that directly influence the plot's outcome.