Circuitdream.exe

circuitdream.exe is a Yume Nikki fangame made as a crossover with the anime series Yu-Gi-Oh! 5D's.
The game features Antinomy and his twin younger brother Bruno. Bruno is in the hospital and it is up to Ant to find out what happened to him by exploring his brother's mind using the mysterious program "circuitdream.exe". By exploring Bruno's mind, Ant learns a lot about his brother that he never knew, as well as things about himself.
So, what could have happened? Is Bruno sick? Was he in an accident? Or was he trying to commit suicide? Antinomy will find out and surely save him!