"Pinorama is the board for all the little things you want to keep handy or aren't sure where to put," said the designer.
The wall-mountable board has a mesh pattern similar to brick courses rotated 90 degrees, which allows users to hook on a collection of accessories to customise its storage capabilities.
These elements include cork and metal shelves in two sizes that attach to the front, cylindrical pots that latch onto the front or sides, and magnetic hooks for any of the edges.
The shelves and pots both feature vertical brackets with three catches that correspond with the gaps in the mesh.
Sempé also created a pair of circular mirrors – one large and one small – which stick onto the metal surface.
The boards themselves are also available in two sizes and a range of pastel shades. The accessories can be mixed and matched by picking from the same colour palette.
"Pinorama is a flexible wall module that helps you organise your everyday life, providing a functional, charming and versatile storage solution," said Sempé.
Hay first showed the designs in Milan this April, where it also debuted a combined coat rack and picture ledge, and an armchair that resembles a traditional Japanese fan.
Photography is by Rasmus Norlander.