Please Help Me Find a Quick Transmigration Novel Where the Female Lead Transmigrates Into a Cannon-Fodder Character

I read a quick transmigration novel a while ago. The heroine transmigrated into a cannon-fodder role, and each world started right at the point where she was supposed to die. Once she completed the mission, it counted as a success whether she lived or died, so she was fine. Then she would immediately meet the male lead, who fell in love at first sight. I can't remember if it was a fixed pairing.