Help me to find this manhwa

I read it a long time ago. ML is an eldest son, he have a younger brother. He's an exceptional aristocratic and has to be a soldier cuz of a war. FL is noble, she's turn back the time. In her first life, she's die (she's married the ML but having a miserable life cuz ML became limp + broke + trauma after the war and all of the ML family is dead). In the second life FL decided to become a nurse, she doesn't want to marry ML cuz she know the ending. But she ended up falling in love with ML (ML became limp in her second life too).