Born as a cursed child in her village, Shinobu's mother was killed according to village rules. Ever since, the mute Shinobu has endured abuse from her older sisters. One day, under her father’s command—who seeks to restore the family's honor—Shinobu is sent to marry the cursed heir of a prestigious family... essentially offered as a sacrifice. On her wedding night, waiting in a room teeming with writhing tentacles, Shinobu meets the God of Calamity, Tatsuhiko. That night, the two share an intimate bond that changes their fates forever.