Its an explicit manga featuring a transmigrator who got into novel/game/something(i forgot) but she wants to be with a commoner (priest i think)
She is a noble bethrothed to the crown prince whom people say is good etc etc but he is actually evil and a sadist, he “fell” for her cos she agreed with him when he said he is evil. in that world nobody saw that he is evil even when he killed a gardener in front of everyone.
So, he graped her n stuff.
Please share if you know this manga thankssss.