Very sweet. This story will definitely appeal to dog/animal lovers. Happie really loves his daddy.

There are definitely some moments intended to get those tears flowing.

dog gets sick, owner has chest pains, orphan boy wants love but can't accept it, man eventually dies, dog stays loyal even until its death

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This story wants you to cry at something haha. This is pretty all ages, but the mature slice of life tone may not interest younger readers. Also, the divorce talk, estrangement from children, and office life will really only resonate with adults.