The Naruse and Iizuka families lived next door to each other in an apartment building, having built a close relationship over many years of neighborly interaction. One day, the young, beautiful, and charming Kokomi arrived to marry the son of the Naruse family. Upon learning the news, Mr. Iizuka rejoiced as if it were his own good fortune. However, late-night sounds from the couple's bedroom began to stir something inside him, and before long, he became consumed by an overwhelming desire to make Kokomi his own. That night, Iizuka invited Kokomi to his home and served her tea laced with sleeping pills...