Androcles and the Lion by Kathryn Walat

A singing mouse, an escaped slave, and a hungry lion form an unlikely trio of friends whose bond is put to the test by an evil Emperor in this enchanting and heartwarming play. While walking through the jungle, Mouse's passionate singing awakens the Lion, who, despite his immense appetite, lets the tiny Mouse go. Androcles, an escaped slave from the city, makes his way into the jungle where he finds the Lion with a thorn in his paw. Risking capture, Androcles decides to help the Lion and the two become fast friends. But when the evil and lonely Emperor imprisons the two companions and forces them to face off in the arena, it's the tiny Mouse who reminds them all that friendships aren't easily broken.