Her husband died, and she lives with her son and his wife, her grandchildren and her great-grandchildren for four generations.

Realizing that she is being treated as a nuisance by her son and his wife and her grandson, Mariko decides to leave her home at the age of 80 and become independent.

Written and illustrated by Yuki Ozawa [ja], Sanju Mariko, was serialized in Kodansha's josei manga magazine Be Love from June 1, 2016,[1] to June 1, 2021.

[2] Kodansha collected its chapters in 16 tankōbon volumes, released from November 11, 2016,[3] to July 13, 2021.

list of best manga of 2018 for female readers, the series ranked sixth.