Her father dies, and fertility treatment is abandoned. Kawasumi Sae turns 40 and feels that she is entering a new stage in her life, but on the way home from her father's funeral, she discovers that her husband has been having an affair. She returns to her parents' home to help out at the family bento shop, but then her mother disappears...!? What will Sae do when faced with a series of shocking events?! This is a story that asks, "What is marriage? What is a family?", brought to you by Sakai Eri, author of "Shijuukara" and "Hiyama Kentaro's Pregnancy," which were also made into TV dramas.