Yuri Nakae

Follows two sisters, one clumsy and ignored, the other a perfect child. After the latter dies in an accident, she returns as a ghost to guide her little sister.

At a night school a diverse group of students ranging from teenagers to elderly, smart to under-developed and of different races have been assembled to study and finally hopefully graduate.

Ayano, Yuri, Miyu and Mei are high school female students victims of paranormal incidents that may be linked to a gas accident occurred to first-year students in class number 4, years ago.