Otherside Picnic: Novel Omnibus Volume 3 was written by Iori Miyazawa with illustrations by shirakaba and contains volumes 5-6.

Sorawo and Toriko have been spending their days surrounded by the supernatural. They managed to successfully spend a night together in the Otherside and can now venture even deeper! As they go back and forth between the normal and abnormal, they continue to encounter even more strange events...

The two discover a mysterious lady living in a mansion in the Otherside, go searching for a missing man named Abarato, run into Hasshaku-sama yet again, and...some of Sorawo’s memories begin to mysteriously vanish?!