"What is she really thinking?" Ichiro muttered to himself as he soaked in the bath. His wife was away on a trip, leaving him alone in the house that night. Suddenly, his sister-in-law Yumi showed up unannounced. Caught off guard by her unexpected visit, Ichiro couldn't hide his confusion. Her intentions were unclear, but there was an unmistakable air of longing in her demeanor. "Shall I wash your back?" she asked, stepping into the bathroom naked. Ichiro grew even more flustered. It seemed she was trying to seduce him, viewing him merely as a means to satisfy her own desires. Yet he couldn't betray his wife, and knowing she was his sister-in-law made refusal unavoidable. Struggling to cling to reason, Ichiro tried to push her away, but Yumi pressed her body against him with a seductive smile. The atmosphere grew tense, and Ichiro's resolve began to waver.