While undertaking a quest to subdue wyverns, A-rank adventurer Kaiser Clyde witnesses an ancient dragon awaken from slumber, fly to a nearby village, and instantly destroy it. In the aftermath, Kaiser desperately searches for survivors and discovers three babies amidst the rubble. Feeling responsible for the deaths of the villagers, Kaiser decides to retire and raise the children as his own daughters.
He names them Elsa, Anna, and Meryl, and raises the girls with all the love and affection he can provide. As years go by, each daughter's talents rapidly blossom—in swordsmanship, management, and magic respectively. Yet despite their unique aptitudes, Elsa, Anna, and Meryl all share one trait: their overflowing love for their father, which seems to exceed simple familial bonds.