Big adventure of Billy and Hendy

This is my work. It is the picture book...
Mio Morita , 2018

This is my work.
It is the picture book which sticks out "Big adventure of Billy and Hendy".
The story is two cats find the treasure.

But, the adventure is not easy...

They meet very big octopus !!
The octopus is very angry because they get in the way his sleep...

Will they find treasure!?