Therefor, the world of 'I' and 'you' cannot be the same or different. It is because the objects that cannot be shared are impossible to compare from the beginning. The series, “Individual Reality" is the result of thinking about such a dualistic recognition world between self and others. The images to which a particular viewpoint and vanishing point are applied can be recognized as ‘real’ or ‘virtual’ depending on the observer’s point of view. 'Optical illusion' by itself implies imperfection of human sensory system and cognitive system. Reality and illusion are always on the same line, and 'reality' is only a relative and concrete representation floating in such uncertainty. Where is the world we recognize through the five senses between reality and illusion? I raise questions about the coordinates of self-consciousness in each reality.