The shop that only opens on rainy days

It seems that La Mousson Store, located in Rainbow City, only opens on rainy days.

That to be invited, you have to write down your misfortunes on paper and send them by mail to the goblins who manage the place.

That if they choose you, in exchange for your visit they will offer you great happiness...

Serine never thought she would receive her invitation to the goblin store... accompanied by a mysterious golden box!

Once there, escorted by a strange cat with unpredictable powers, she will go in search of her happiness.

And she'll have to hurry: if she doesn't find it before the end of the rainy season, she could be trapped with the goblins forever.