"Mothers in Love" follows the lives of three mothers, who have sons that attend the same school.
An Ishiwatari lived with her husband and son. Her husband worked at a travel agency and An Ishiwatari lived in comfort. Her life changed after her husband went missing. An Ishiwatari now raises her son alone and sends him to a prestigious high school.
Yuko Hayashi is a successful career woman. Her husband is an unpopular novelist and he takes care of their home. Their son is a high school student. Yuko Hayashi's family seems to run smoothly, but she worries about her son.
Mari Kanbara lives with her husband and they have 3 children (1 son and 2 daughters). Her son attends the same prestigious high school as the sons of An Ishiwatari and Yuko Hayashi and her husband works at a law firm. Mari Kanbara appears to have an enviable life, but her husband is having an affair. Mari Kanbara is unable to even blame him for his infidelity.
Adapted from the manga by Fumi Saimon.