One of the most characteristic features of soft matter (e.g., polymers, liquid crystals, and colloids) is its hierarchical structure. Recent studies indicate that even a simple liquid has a similar level structure. It is expected that complex couplings among the different levels of such a hierarchic structure play a crucial role in the cooperativity of functions of soft and bio matter. However, there have so far been few studies on the role of hydrodynamic interactions on inter-level couplings and how the level structure of a liquid itself affects functions of soft matter. Focusing on these problems, we aim at understanding the basic physical principle behind the cooperation among multiple functions, which is unique to soft and bio matter.