Shiori is turning 35, married for 3 years and trying to adapt to the unvarying and boring routine as a wife. She thought that this tranquility will be their future as a married couple but one day she stumbles on a diary on her husband's study. As Shiori reads through the pages, she realizes it is her husband's diary where he put down in writing all his private moments with his lover! Is it time for Shiori to start her own diary?

Update: Seven Seas announced on December 3rd, 2020 that they will be publishing this series in English with Vol.1 coming out in Aug 2021, full text here