Haruka Shimotsuki

The Little Busters’ outing went off peacefully, and now that the summer holidays have started, most baseball team members have gone home. Among the few still around are Riki Naoe and Kudryavka “Kud” Noumi. However, Masato has caused quite a bit of damage to the boys’ dormitory by hitting it awkwardly with a baseball, so it is now underwater. A new place to stay is needed, so the boys are unceremoniously put up with the girls. However, not everyone will be able to enjoy the luxury of a bed.

In order to survive the eventual arrival of the "Dusk End," people of the western reaches of the "Land of Dusk" devoted their efforts to rediscover and recreate lost alchemic technologies. Those technologies were then gathered in the alchemy city known as "Central," where research was conducted on how to halt the advance of the twilight. Having learned the newest alchemic techniques in Central, young alchemist Logy requested a transfer to an understaffed town of Colseit on the frontier to make use of his abilities. There he meets Escha, an apprentice girl assigned to the Development Department. Together, the two make a promise to use their alchemic techniques to bring success to the Development Department.