Mariko, the mother of a large family, has busy mornings. Due to her loving nature, she adopted children from her ex-husband and underprivileged children one after another, showering them with love without discrimination, and now she is single-handedly raising seven sons and supporting the family. Surrounded by her beloved sons, Mariko spends her days living under the same roof, deeply connected with them, until one day her ex-husband comes over with his son, Shiro. Seeing his lonely expression, a Kokoro of compassion begins to grow in Mariko...