Hello! The third devotion point is a bit weird to get. During the first fateful choice, you need to give in to the corruption. While talking to Yukine you need to choose the option about being concerned about body language. Immediately after that choose the yes option. Finally choose to converse with him in the clothing store and it should unlock that devotion point.
I know that it is a bit confusing. Points with that character are supposed to be tricky to get.