Real-time and Slow-motion are incompatible. This is the essential incompatibility on the difference between “play” and “playback”. In this research, we propose Real-time-Slow-motion, a framework for slow-motion without deviaeting from real-time, inspired by the idea that “the practically cognized present is no knife-edge, but a saddle-back, with a certain breadth of its own”, in which humans can perceive multiple inputs as something continuous. Our approach is, on the very saddleback of the present, to stretch and fold the original timeline into multiple layers of timelines, and hope that the folded timeline will be unwound in humans, resulting in the environment appearing slower in real-time.