In my previous life I was a saint, but now I want to cut corners

Renaria suddenly remembers her memories from her previous life. In the past, she was a saintess who was proficient in light magic, However, using this magic is life-threatening…
The princess fakes, attempting to kill herself because she is in love with Renarias Fiance, the second prince. Using holy magic as is the duty of a saintess, she loses her life reviving the princess. Now she is starting off her teenage years with her memories intact and a goal in mind to avoid being noticed by the royal family. Can she protect her identity? Will she be married off? Only time can tell