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 saint 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 Renaria's fiance, the second prince. Using holy magic as is the duty of a saint, 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 will tell. (Source: Shousetsuka ni Narou, translated)