This is a framework which brings out dynamic construction between <self, inward> and <world, outward> taking act of <beat> as a starting point/moment. This instrument gradually amplifies the gap of the each beat interval and produces sounds at the extended or contracted intervals by computer in real time. The actor encounters non-repeating rhythm included in own constant beating which is also affected simultaneously, and from mutual interposition between the inward and the outward, rhythm pattern – self is generated, and also disorganized. This work is designed to derive the movement-rhythm from which inward/outward arise and disappear by undermining <self> in act from within rather than viewing already prepared <work> or interpreting work by <self>. (HORIE Toshiyuki)