Ichimonji Hayate is an energetic ordinary highschooler. Chatting nonesense with his bestfriend Kirika, going home with his sempai he admired...that's how he spend his peaceful day - or so, he thought. One day, he met a mysterious girl, and gave him a cellphone called D-phone. It was for gathering some urban legends that was linked to "8th world". He was chosen to be a main character of the "100 stories". The new transfer student whisper to him "why don't you answer the phone?"