Invisible-Irina in the afterlife

This story was born from a dream of mine. Again. I got a lot of interesting dreams and some I turn into stories.

Irina was dead, she was a ghost. She was invisible. And she got a hunger for some reason. She lived alone for a while, wandering through the world, having little adventures. Then Irina met a boy. He was different. They become friends and she showed her how she got along. He asked a lot of questions... What is his secret?