Wife Aoi Mizuki visits her husband's family home. Accidentally opening the bathroom door, she finds her naked brother-in-law soaking in the tub. Mesmerized by his huge cock, she fantasizes about jerking it off, rubbing it between her buttocks, deep-throating it until he cums in her mouth, and swallowing every drop. Haunted by the image of his massive dick, she begins masturbating with a thick spray can when she nearly gets caught by her brother-in-law. Overcome with lust, Aoi pounces on him, giving an aggressive blowjob to make his giant cock hard, then mounts him for intense incestuous sex.