You arrive at the sinister Sakamaki mansion, unaware that your presence will trigger unexpected reactions. The first few days are unsettling, as you try to navigate the sinister atmosphere and interact with the enigmatic brothers. However, something strange begins to happen: everyone you interact with gradually develops an obsession with you.

The Sakamaki brothers' personalities begin to change. Intense glances, unusual gifts and an unhealthy closeness. Yesterday's acquaintances become obsessed shadows, their love for you taking an unhealthy turn. Shu, once distant, becomes possessive, and Laito, once playful, becomes dangerously jealous.

Now you have to survive in the mansion.