Mana's friend Miyabi has quarreled with her mother over something trivial. When she wishes she could go back to when she was little, she suddenly finds herself lost in a forest. There live mysterious children, forest spirits, the Kinoko. They invite Miyabi to play, and Miyabi innocently joins them. In the Kinoko forest, there are no adults, no school. It's a world with nothing to tie her down. Miyabi begins to wish she never had to leave. But, slowly, Miyabi's mind and body mature while the Kinoko around her stay the same, leaving her baffled. That's when Kitaro appears after receiving a request from Mana. Will Miyabi return to her old world, or will she stay in the forest?
Human girl, I shall care for you
for the rest of your life.
أيّتها الفتاة البشرية، سأعتني
.بك إلى باقي حياتك
Menschenmädchen, ich werde dich für den Rest
deines Lebens lieben und verwöhnen.
Muchacha humana, te cuidaré 
durante toda tu vida.
Muchacha humana, te cuidaré
durante toda tu vida.
Jeune humaine, je m’occuperai bien
de toi pour le restant de tes jours.
Fanciulla umana, ti coccolerò senza limiti
 per tutta la tua vita!
Garota humana, eu cuidarei
de você pelo resto da vida.
Дитя человека, я буду заботиться 
о тебе всю оставшуюся жизнь.