They Both Die at the End

They Both Die at the End is a young adult novel written by American author Adam Silvera and published on September 5, 2017 by HarperTeen. It is Silvera's third novel and focuses on two teenage boys, Mateo and Rufus, who discover that they only have one day left to live.
Victor hasn't collided with Mateo and Rufus in the story, and the story just ends with him dangerously driving in his car to reach his fiancĂ©. ... The story also ends with Rufus passing the street without anyone, or in particular- Mateo- to hold him back. Last time Mateo did it, it was to warn him of passing cars.