The communion of inside and outside. Through the extension of cross-lighting and the opening and closing movement of the medium, it breaks the boundaries of space and extends internal to external unlimitedly. A single-line flow runs through the whole space. It redefines and transforms the boundary of regions to unconsciously influence the experience of life. The penetration of glass gives a narrative about the design attempt which leads light into the chamber. The comforting concrete wall leads an outdoor calm atmosphere into inner space, and the original timber brings life back to nature.