What shade is the environment you reside in? Over ten years have passed since "Perception Art" first appeared in the art world. Technology now permeates every aspect of the planet and plays a vital role in people's daily lives. The famed "artists" and inventors of perception art, Mr. and Mrs. Yamanashi's son Kazuya Yamanashi, recently enrolled in Eisen High School with his childhood buddy Jun Tsuzuki with the goal of one day becoming a perception artist. Kazuya also had another goal in mind: to reconnect with "another childhood friend" after they had grown apart following "an incident" ten years prior. The son of a well-known "grader" and the inventor of perception art, Kyou Takise is a junior at Eisei High School specializing in perception art Kazuya and Jun were childhood friends of his, but he hasn't spoken to them in a while. Scars that were invisible were all over Kyou's heart. Different "colors" converge and cross over one another. What "color" does the scene appear to be in front of their eyes?