Unn is 80 years old, lives in a nursery home and is looking for love. Her body bear witness of a long life, but on the inside beats the heart of a twenty year old girl. When a 25 year old boy becomes Unns new nurse, her heart beats faster and faster, and an old love bloom.

Unique monsters that suddenly began to appear all over the world from the beginning of the 20th century. At first, human beings tried to resist, but in the face of their enormous power, they came to the conclusion that complete extermination was impossible, and concentrated their wisdom on monitoring and analyzing monsters. The United Nations Kaiju Observatory (commonly known as Coulons) was born. Leading by the indomitable leader Yuichiro Kaido, the authority of monster ecology, Toji Kobayashi, the talent of monster function analysis, Claire Coleman, the maverick of monster disaster prevention, Kenny Mikoshiba, and the nobleman of monster strategy, Nikita Tarkovsky. A new generation Lulu de Picard who paved the way for monster linguistics, and Guillermo Marquez, a monster life science tycoon. Experts in monster science monitored and analyzed hundreds of monsters, and continued to explore a world where monsters and humankind live together.

为《暗芝居》系列制作团队推出的新作「纸芝居」动画，由喜爱怪兽的创作者们创造出原创怪兽，以昭和怀旧的画风呈现，并且每只怪兽都会配合一首主题歌曲进行介绍。 　　故事舞台为性格丰富们的怪兽突出然出现在世界各地，集结各方智慧以监视、分析怪兽的组织「国连怪兽监视团」，摸索如何让拥有强大力量的怪兽可与人类共同生存。

为《暗芝居》系列制作团队推出的新作「纸芝居」动画，由喜爱怪兽的创作者们创造出原创怪兽，以昭和怀旧的画风呈现，并且每只怪兽都会配合一首主题歌曲进行介绍。 　　故事舞台为性格丰富们的怪兽突出然出现在世界各地，集结各方智慧以监视、分析怪兽的组织「国连怪兽监视团」，摸索如何让拥有强大力量的怪兽可与人类共同生存。

2023年1月から 続編 放送決定！！ 　　島野耕汰が描いた新メインビジュアルを公開！！

2023年1月から 続編 放送決定！！ 　　島野耕汰が描いた新メインビジュアルを公開！！