A proposal for the thematic pavilion on water for the 2012 Yeosu International Exposition, whose theme is “for living coasts and oceans”. This is also the second series of the “mobile tower” in a flexible skin by carbon fiber. The skin is set in motion by the motorized oval-shaped mechanism to remind the image of the tide. A reflection on architecture that would visually melt into nature by materials and light, and also that functionally synchronize with environment by sustainable approach exploiting the inertia of sea water.