Title: Uroboros's Circle (ウロボロスの輪)
Creator: Yozaburo Kanari (金成 陽三郎), Yamamoto Keiko (山本景子)
Length: 2 volumes
Status: Complete

"The moment you open the letter, you will be cursed. After reading the letter, you have to make two copies and send it to a close friend within 24 hours."

Everyone knows what it's like to pass notes in class. People carelessly write about things like love or gossip. One day, everything suddenly turns out evil...

Joint project with Serenus Dreamers starting from volume 1 chapter 4.