Ed Sheeran. Cira Jackson.
The pair meet at a café one night, at about two in the morning. Though they just met, Cira invites Ed to spend the night at her house. Not for any reason, other than her not wanting him to walk home alone.
From there, a weird friendship develops. They both learn everything about each other, and become the closest and best of friends.
Together, they can tackle the world and anything the world throws at them, but soon things become too difficult, and everything spirals out of control.
What happens next, not even they know.
(My god, I think my descriptions are just getting worse.)