Hashimoto takes one look at Yumi, the mother of his adult coworker Ryota, and immediately wants her. He uses Ryota to slowly get closer to the Yasuno mother and son while waiting for an opening in Yumi’s lonely heart. His chance finally comes after Yumi finishes a phone call with her workaholic husband, who neglects his family, and begins masturbating alone. After savoring the lewd sight, Hashimoto returns to the Yasuno home at a time when he knows Yumi will be there by herself...