Pls help

Ok so, I'm trying to find this manhwa to reread it and I can't remember a lot of details about it but I remember the one scene that makes me want to reread it. It's your typical historical and family type of genre i think and the scene that I'm talking about is she's a saintess and the villain is like the fake one, they had to stay in a temple or like a church i think so that the previous saintess can choose the next one to be a saintess and then they were tasked to keep a scared thing that's gonna be use for the ceremony, the fake one has to keep a pet and the real one is I think it's a mug? And then the fake one tried messing up the tasked that the real one has, she broke the mug and then tried to framed the real one's maid of being incapable blah blah blah AND THAT'S IT, THAT'S THE ONLY SCENE THAT I REMEMBER FROM IT. If you go to my homepage, you can clearly tell my frustration of trying to find a book that I've already read