While job hunting in Tokyo, I end up staying with my older brother and his wife. Even before they married, I had always admired my beautiful, kind, and slightly naughty sister-in-law. Now she keeps carelessly flashing her panties around the house. Living under the same roof with that constant view becomes too much, and I lose control. She's bewildered at first, but her pussy is already soaking wet—and naturally, I'm rock hard.