I have been trying to find this one but i dont remember much about it. I think fl was a saint candidate of some sort but she runs away from the chruch and meets the ml. shes got a very carefree strong personality and both the fl and ml develop a chill chemistry and are so nonchalantly comfortable with their skinship. they return to the church for something and the moment ml realises shes a saint candidate boy legs it away and that was the last chapter i rememebr reading. but they were so cute and were so comfortable with eachother and i have just never had any luck finding it.
not sure because your description was quite vague but maybe https://www.mangago.me/read-manga/anyone_can_become_a_villainess/
broooooo