There are two stories linked by the same hero Azusa.

In first story Azusa sees the same dream every day - her junior is depressed by her disappeared friend. With the cooperation of psychiatrists, Azusa approaches the identity of the criminal ....

In the second story the theater department starts to use the stage of underground auditorium. However, suddenly they get cut off the exit trapped underground. The voice of the woman who disappeared last year starts to resonate in the air and the figure of the first victim appears...

[From vndbreview]