Husband's father, Fusagi, who came to replace her husband, Seiichi's business trip. Tsukasa is violated by Fusagi for the good thing that she does not have a husband. Tsukasa, who hated at first, is fascinated by her father-in-law's big cock, which is incomparable to her husband. Tsukasa who keeps getting raped every day for a week on a business trip. Someday she becomes a captive of Decamara ....