In the future, human prisons are conducting experiments to transform criminals by injecting them with animal blood (genes). The government calls this the “Human Purity Project.”At the start of the game, the player is randomly selected as an experimental subject and is injected with a random animal gene every day. Players use their fixed daily schedule to engage in strategic conversations with different NPCs. Depending on their gene modifications, they gain various abilities, leading to different game paths and outcomes.