While working as a salaryman, the protagonist finds joy only in sleeping, as his dreams transport him to a fantastical world. One day, while in his dream with an elf, they are unfortunately burned by a dragon's breath. He awakens in his Tokyo apartment to find the elf girl sleeping soundly beside him, realizing his dreams were not dreams at all. The story follows their daily life in Japan, filled with familiar places, delicious food, and adventures in the dream world. It's mainly a slice-of-life story with romance and lighthearted moments, but also includes battles.