This is a collection of 5 short horror one-shots and a series of 4 koma strips, all by different authors.
Jushin Mail -- Imai Yasue
Kibou no Megami -- Shimizu Masumi
Death Spiral~Eien no Jubaku~ -- Komuro Eiko
Mirai Diary -- Sugawa Maki
Noroi no Tatebue -- Makihara Wakana
Tsuki Megami no Kaidan~Kuro no Jikenbo~ -- Hayatsu Chisato
Various 4 koma manga -- Usagino Mimi