In my previous life I was a saint, but now I want to cut corners is a Manga/Manhwa/Manhua in (English/Raw) language, Adventure series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

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