Futami, who worked for a mid-sized company after graduating from high school for 40 years and was about to retire soon, was smiling at her daily work but was mentally trapped. One day, she finds a kappa at a shrine he visited for her company, and after a while, she stepped aside and falls into a deep hole, and woke up to find herself in the world of kappa. As she interacts with these unique creatures, she realizes that their lives were in common with those of humans. When she began to feel that there was no place in the world of kappa and tried to go back to the world of humans ...Edit Translation