Otherside Picnic: Their Strange Exploration Files (裏世界ピクニック ふたりの怪異探検ファイル Urasekai Picnic: Futari no Kaii Tanken File) is the first novel in the Otherside Picnic series. It was released in Japan on February 23, 2017 and September 23, 2019 in English. The series is written by Iori Miyazawa and illustrated by shirakaba.
Her first encounter with Toriko Nishina was on the Otherside after seeing "that thing" and nearly dying. Ever since that day, exhausted university student Sorawo Kamikoshi's life changed. In this Otherworld, full of mystery, which exists alongside our own, dangerous beings like the Kunekune and Hasshaku-sama that are spoken of in real ghost stories appear. For research, for profit, and to find an important person, Toriko and Sorawo set foot into the abnormal. A tale of two girls' bizarre exploration and survival, brought to you by an up-and-coming Sci-fi author!
- File 1: Kunekune Hunting
- File 2: Hasshaku-sama Survival
- File 3: Station February
- File 4: Time, Space, and a Middle-aged Man
- Works Referenced (Vol. 1)