Derealization tells the story of a 30-year-old man. The hero is not at peace with himself. One day, he decides to change his place of residence to escape from psychological problems. The main character moves to Steelport. However, he fails to regain his peace of mind there. As a result, the guy has more and more questions for those around him every day. He begins to consider his old and new friends inadequate. Due to his difficult character and poor mental state, he will have to find himself in various non-standard situations. The plot is full of sudden twists. This project is designed for an older audience due to the presence of erotic content and an abundance of foul language. According to the scriptwriters, in their creation, sex drives the narrative, and not vice versa.

Derealization is a visual novel and a dating simulator. Unlike many other VNs, it uses 3DCG graphics rather than the usual 2D anime-style graphics. Players are traditionally allowed to choose lines or actions at times. Some user decisions affect the further course of the plot, while others merely create the illusion of nonlinearity. Certain NPCs remain in the story regardless of the outcome, and specific sex scenes are mandatory for completion. Sexual acts are shown through pre-rendered images. There is a variety of fetishes.