During my wife's return to her hometown, her sister, Koinatsu, came to check on us. We were delighted to have a long-awaited guest and were happily chatting away... but the situation changed dramatically when Koji went to take a bath. "Please, don't come in, sister-in-law!" Overpowered by Koinatsu's insistence on washing his back, they ended up soaking together in the tub. In front of him, Koinatsu's defenseless and beautiful body stirred a surge of desire, despite his thoughts that it was wrong.
