Preserve the Villainess's innocence

Amelia was reincarnated as a ruined noble girl in a fantasy reverse harem novel world. The thing is, she wasn't aware of it at all and kept on interacting with the main protagonists without a care and with a large smile on. Amelia, now Eufemia, has a peculiar ability which allows her to see how corrupt people are. One day, she meets a little girl who is a 0%. Translucid like water! Eufemia would do anything to preserve her angel's innocence! What she didn't know was, that angel was actually the novel's villainess.