Shiki - Season 0 Episode 1 Twentieth Mourning and Malice (Episode 20.5)
Overview: In a flashback, Nao explains to Mr. and Mrs. Hasegawa about her joy of marrying into the Yasumori family. After mentioning her son Susumu, Nao asks the couple if they have any children; Mr. Hasegawa tells her that they lost their children* in an accident. Afterward, Mr. Hasegawa reminds his wife that they are not the only people who have suffered losses; and that he is glad that they moved to Sotoba.