Ai makes her first appearance as a blue butterfly after her apparent death. Her companions now work as ordinary people. Ai's new companion, a young boy named Yamawaro, calls Ren back to Ai while Kikuri possesses a doll and calls Wanyüdö. Bewildered that Ai has returned, her group take on a case after a long time: a rebellious high school girl, Itsuko Hiraishi, hates her teacher Tange because he records every fault of his students in a notebook, saying he will put it in their permanent record...