Due to family circumstances, Uzuki is married off to the Kamishiroto family.
A loveless marriage, sex as a chore just to produce an heir.
A heart and body that are not satisfied day by day...

Then, a stone is literally thrown at Uzuki.

"I just wanted you to notice me, even if it meant breaking the window,"

says the neighbor who is also a police officer, Rurigaki Kenichiro.

He starts visiting the Kamishiroto family on patrol, and
begins to expose Uzuki's desires that have been suppressed by her solitude...