Every night, the voice of work leaking from the wall... A middle-aged man living alone, Nishikawa and his wife moved in next door to Asami. The walls of this old building are thin, and you can hear the activities of the Nishikawa couple. Asami's daughter-in-law next door, Yui's sweet voice inflated her desires. One day, Asami, who intercepted the courier addressed to the Nishikawa family, invites Yui to her home and commits it. After that, Yui's body began to seek pleasure from Asami, who ambushed him on his way home from throwing away garbage and repeated mischief.