In the near future, science and technology will be highly developed, and neural network interfaces, prosthetic body modifications, and immersive virtual reality will become popular. Giant corporations monopolize resources, social classes are solidified, the gap between rich and poor is huge, neon lights and dirty streets coexist (classic cyberpunk elements). After a global unknown energy tide ("Heart Tide"), some humans discovered that they were able to sense, absorb, and manipulate an emotional energy called "Heart Source Element", and developed special abilities based on this.
