"Heart to Heart" is a story which people and creatures come onstage.
Even though they have different colors and shapes, their hearts are all the same.
Through the creatures with the appearances of human beings,
a man realizes how wonderful growing-up is.
Going through many feelings, people and creatures become mature.
Sorrow, pain, hatred, grief, delight, happiness, smile, and gratitude.
There are 108 stories included many hearts.
It was being published both Japanese and English every story.