Long ago, a curse was placed on the Rindo family. The curse dictated that the family could only bear daughters. The sole method to temporarily break the curse was to have a child with someone from the Hizuki family. Once lifted, the curse would return to haunt the family every third generation. Many years have passed, and now Naoto Rindo is the unfortunate one. His former fiancée, Suzune Hizuki, died in a tragic accident, so he must now impregnate one of the other four girls from the Hizuki family; however, time is running short. But wait, did Suzune really die? Mysteries surround exactly what happened and what will happen, since Suzune is still alive.