Prima Doll: Winter Sky Fireworks / Snowflake Patterns

Story about Haizakura's past.
Republic of Altaria celebrates the new year. The girl named Riria is being chased by Imperial Army. The person who saved her from the predicament was an automatic doll with a carefree atmosphere around her, Haizakura. Will she be able to grant Riria her wish to go to Lobelia?

Story about Karasuba's past.
Karasuba wakes up from maintenance. There, on a small resort island, the doll technician Tooma Nagi, who fixed her up, gives her a new role to be a maid doll. As the spring approaches, the footsteps of war are also drawing closer.

[Translated from official site]