This is the second in a trilogy of psycho-suspense horror! Imako, a new teacher, feels the shadow of her twin sister, Yui, who committed suicide in her second year of high school, and it is getting closer day by day.What is the surprising fact hidden in Yui's suicide...

This is the third installment in the suspense horror trilogy! One day, Maiko, a high school girl, has a strange dream. The next day, the same phenomena as the dream begins to occur around Maiko. The next day, the same phenomena as in the dream begin to occur around Maiko, and a mysterious transfer student, Mayu, appears in front of Maiko, who is terrified.

The highly popular series outside the 23 wards of madness, the first collaboration by the most popular gravure actresses, is now available in a long-awaited omnibus!