Average salaryman Kitase Kazuhiro's hobby is sleeping. In his dreams, he visits a fantasy world where he adventures with an elf he's befriended named Marie. But one day when he wakes, the girl he's only seen in his dreams is there beside him!

Life in Japan continues to surprise and delight Marie. But when night comes, the ruins await her and Kazuhiro.

Kazuhiro and Marie focus on their plans to explore the labyrinth, then Kaoruko invites them out to dinner!

Kazuhiro and Marie enjoy a day in Japan. Later, they theorize that they'll be able to return to Marie's world if they fall asleep together. That leaves just one problem—they'll wake in the same place they left, with an angry Arkdragon lying in wait!

Kazuhiro and Marie are enjoying life in both the fantasy world and Japan. They go to look for magic stones in the blazing heat of the Ujah Peak ruins.

Kazuhiho and Marie have a plan to beat the bandits and stage a rescue, but the bandit boss has other ideas!

Exploration permit in hand, Kazuhiho and Marie visit Mewi and learn that something happened to the Arkdragon!