Ichika had never felt emotionally or physically satisfied by her self-centered husband in bed. One day, while chatting with her neighbor, Mrs. Takada—Yumiko—at the water well, Yumiko's son, Tatsuya, suddenly appeared. She hadn't seen him in a long time, and was shocked to find he had matured into a full-grown man. Yet Yumiko continued treating him like a child, and witnessing this stirred a deep sympathy within Ichika. By chance, she ended up spying on Tatsuya masturbating, discovering that his body was undeniably that of an adult. The shock and overwhelming pity shook Ichika to her core.