Read: Ch.27 (Ch.26 is from another manhwa)
MC gets reincatnated as the saintess‘ (aka OGheroine) twin sister and is the villainess torturing ML as a slave and gets killed for it, when he escapes and turns into the OGmain villain. In order to survive and change ML‘s future, MC starts treating him right and deploys him as her servant. She also tries to help him with his escape.
MC‘s ditzy twin sister is so nice and adorable, she really likes MC. OGML for MC’s twin sister is the crown prince, but they start off on the wrong foot thanks to MC.
Their father aka duke is also very nice to both his daughters.
The Villainess Just Wants to Live in Peace!