Ketsuna and Vixia Wynstar are a married adventurer couple that decided to settle down in a seaside city. However, their skills are needed to help defend the kingdom of Zaledrid from frequent dragon attacks. This does not settle well with the Ironscale Slayers, the queen's very own dragon-slaying guild, but what will Ketsuna and Vixia do when they are forced to join the guild in order for Ketsuna to gain citizenship? What will become of them when they find that the kingdom that they have sworn to protect is not actually as innocent as it seems?