Kitaku Tochuu de Yome to Musume ga Dekita n dakedo, Dragon datta.

After his father’s tireless efforts secured a two-generation mortgage, the protagonist finally achieves the milestone of owning a single-family home. On the very evening he moves in, a simple errand for his younger brother takes an unexpected turn when he encounters a distressed blue-haired girl who claims to have been kidnapped. Acting on instinct to protect her, he subdues the alleged perpetrator with a decisive lariat, only to discover that the true victims are not people but two enormous eggs hidden at the scene. The moment he makes contact with the mysterious eggs, they crack open to reveal two infant girls, instantly transforming his quiet new life into something far more extraordinary. In that pivotal instant, the blue-haired girl declares him to be their father, binding him to a sudden and bewildering familial responsibility. What began as a celebration of independence and domestic stability now evolves into an unforeseen journey of parenthood, where the boundaries between human and dragon blur, and a brand-new household is formed through fate, compassion, and an accidental act of heroism.