naturalness
noun /ˈnætʃrəlnəs/
  /ˈnætʃrəlnəs/
[uncountable]- the state or quality of being like real life- The naturalness of the dialogue made the book so true to life.
 
- the quality of behaving in a normal, relaxed or innocent way- Teenagers lose their childhood simplicity and naturalness.
 
- the style or quality of happening in a normal way that you would expect- the naturalness of her reaction