Transfer copyright to the Client(The Artist will NOT exercise her/his moral rights)

I have asked you to design a message card to be used for the birthday festival of the idol child scheduled to be held in July. I heard your story from acquaintances, I wanted to ask you for design by all means. As a design, the group's responsible color is green, so I think if there is an illustration in either the left or the right with the green as the keynote. I like singing, so I think that you can studying notes. Moreover, since the person himself likes cats, I think that it is good if there are a few cat elements such as cat ear attaching.