Saya's father worked oversea as a doctor, and Saya traveled with him, reading a treasured manga. When she returned to her hometown, she met Riki and played soccer with him until it started to rain. On the way home, a mudflow seemingly killed Saya, but not long before she entered the artificial world that Kyousuke created. She died in every scenario of the game, thus making Kyousuke repeatedly "wind back the clock"...