It is a mixture of both the original and modern au. They have chakra and all of that stuff but they also have stuff like phones, laptops, cars, etc.
Naruto Uchimaki
19 years old
Married to Sasuke Uchimaki
Parents are alive
Friends don't know that he is married
Apart of a deadly mafia group
Sasuke Uchimaki
18 years old
Married to Naruto Uchimaki
Itachi still murdered the clan
Joined his husbands' mafia when he married him
You'll know their children later on in the story
Bye Yokiibears