[tenshi no hane]

Her father left when she was young.

She doesn't know her father's face. She has of course never asked Mommy anything about her father not at home. But she knows that the scenery she looked out of the window listening to the yellow cassette tape in her oldest memory was just at the moment of her parents' devorce, and that the man Mommy was seeing off silently was his father. After having noticed that, she listened to the story in the yellow cassette tape again and again.

All Night Nippon - Dec. 28 1998 (masa's translation)