"shinde Miro" To Iwareta No De Shinimashita

Description : The tragic woman who went back in time will change the future for her beloved family!
After being treated coldly by her husband, Nathalie, a former countess, committed suicide after her husband, Julius, encouraged her to die.
Before she knew it, she finds herself back in time to more than ten years ago, when she was still happy. She lost her parents to disease and war, and was married off to Julius, the jet-black knight who saved her country... she doesn't want to live that life anymore! But every time she tries to change the future, she gets caught up in unexpected incidents, and somehow she always gets saved by Julius!
I don't want to be told "I want to protect you" all of a sudden...!
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(https://ncode.syosetu.com/n7420hq/)