Otherside Picnic

Otherside Picnic (裏世界ピクニック Ura sekai pikunikku) is a Japanese light novel series written by Iori Miyazawa. The series has also been adapted into a manga series starting February 10th, 2018 being serialized in Shonen Gangan.

Plot
The series focuses on Sorawo Kamikoshi and Toriko Nishina, two young women who discover doors leading to the Otherside, which is a world where many monsters from ghost stories are actually true. These doors can appear all over the place, such as in a run down apartment building or by pressing a certain combination on an elevator.

Toriko seems to be looking for someone, while Sorawo is interested in escaping to a new world.