The wife's sister, Iori-chan, ran away from home after quarreling with her husband. She's like my sister, the wife's favorite sister. But something's different about Iori-chan's behavior. It seems she was jealous of our loving couple, so she started wearing sexy clothes that emphasize her breasts. And... she's jiggling them on purpose? Those are huge breasts... At first, I wasn't interested, but because she was so manipulative, I lost my reason and was drawn to those jiggling breasts....
