Determined to finally pass his college entrance exams this year, Ken ta spends his days studying hard while living alone in Tokyo. The only comfort in his otherwise stressful life is his neighbor, Yumi Anno, the wife of the family next door. Her gentle presence brings him small moments of peace amid his grueling routine. One day, Ken ta visits Yumi's house on an errand. He finds her doing laundry in the yard and senses something different about her—something unusual. In that instant, he realizes with shock and confusion that she isn't wearing any panties. From that moment on, the image of Yumi without underwear becomes deeply etched into his mind. His feelings grow stronger each day, pulling him toward an inevitable encounter filled with tension, desire, and forbidden temptation.