Himawari-chan asks for Yūko's help to solve a series of mysterious incidents occurring at the school, involving a game called angel. Yūko meets Himawari-chan, and Watanuki is forced to work with Doumeki. Doumeki begins to learn about his true nature.

As Watanuki has more encounters with the mysterious woman, his condition worsens and Doumeki decides to intervene.