Submissive (Larry/Ziall/Ziam)

In this world you're either a Dom or a Sub.
Louis Tomlinson -a sub- has just recently turned 18 years old, meaning he needs to take the Dom&Sub test that will match him up with a Dom.

What happens when he gets put together with 32 year old Harry Styles, CEO of the Styles Company, who is a Strict Dom?