After miraculously rediscovering his heart in A Time for the Heart, Oowa lived happily for a time in his own little world. But one day, he met a little girl who never smiled. Others thought this glum child strange and shunned her, but Oowa befriended her and soon discovered that she wasn't so glum after all: she simply did not know how to smile. Oowa set out to teach her, to no avail. In Smile, please, readers follow Oowa as he discovers the secret of the girl's missing smile - and in the process, reveals something within himself that could actually change her whole world.