mother's secret

Mirei divorced her husband and lives with Yoshihiko. Mirei told Yoshihiko that her husband had died, and Yoshihiko believed that. And of course, she didn't know that she had another brother... One day, Mirei's ex-husband suddenly visits her. Mirei shows disapproval of her husband's desire to get back together, but she hears that Yoshihiko's younger brother Haruhiko, who was taken in by her husband, wants to meet her. Moved by those words, she steals Yoshihiko's eyes and begins an affair with Haruhiko the next day, but...