neighbor's wife

The Naruse family and the Iizuka family, who live next to each other in an apartment building, have built a close relationship over many years as neighbors. One day, a young and beautiful Kokomi marries into the Naruse family. Iizuka rejoices at the marriage of the Naruse family's son, whom he has known since childhood, as if it were his own, but the sounds of a happy couple leaking through the walls in the middle of the night gradually rob Iizuka of his reason. Then, Iizuka, who wanted to make Kokomi his own someday, called Kokomi to his home and made her drink tea containing sleeping pills.