You always wanted to be an adventurer and after a lot of time to prep you finally decide to take the guild test to valued your starting Rang as an adventurer. At the testing grounds you meet the two sisters Lia (worrior) and Aura (magician) who also take the test on the same day as you. Since a party needs to have at least 3 members they are still looking for company and talk to you.

After the death of your parents many years ago, your sister and you only have each other. You work a special job while your sister is still in highschool. One night after you come from work you want to watch a movie together with her until some breaking news about something serious in the world the movie interrupt.