1 series has 7 characters, includes 6 regular one +1 secret.

Miehuhu is a little ship who loves to daydream. 
It's best at leeting its thoughts drift away in unexpect moments....
As the sounds of the world fade away, its wondrous journey officially begins.
Perhaps the shape of a cloud, perhaps the scent of a breeze, can become the key to another world.
In that 'dazed' realm that belongs only to it, time becomes soft, and happiness becomes simple.
It quietly collects these sparkling, unexpected little moments of joy.