A forbidden physical relationship between a brother and sister who are related by blood. Brother and sister are alone at a hot spring inn where no one knows them. On this trip, the very shy sister gathers up the courage to be filmed for the sake of her beloved brother. The devilish brother continues to forcibly inject his incestuous semen into his innocent and brave sister until she becomes pregnant. A forbidden incestuous hot spring trip for two days and one night with the aim of impregnating his obedient sister who he can cum inside whenever he wants. *There are no performers under the age of 18 in this work.