Songfacts®:

• Harry Styles kicks off his debut solo album with a plea to a girl that has walked out on him.
  
  I walked the streets all day
  Running with the thieves
  'Cause you left me in the hallway
  (Give me some more)
  Just take the pain away
  
  Harry is cut up by this girl's actions. However, he hasn't given up on the relationship and in the chorus, he tells her that he'll always be there ("at the door"), waiting for her.
• Harry Styles wrote the song with:
  
  American producer Jeff Bhasker, whose previous credits include fun.'s "We Are Young", Kanye West's "All of the Lights" and Mark Ronson's "Uptown Funk."
  
  Frequent Bhasker associate Tyler Johnson, who was also the engineer on the 2012 Bhasker-produced Pink hit "Just Give Me A Reason". He has also worked on artist projects for the likes of Ed Sheeran, Taylor Swift, Keith Urban.
  
  Another frequent Bhasker associate, Alex Salibian who is part of the Americans production crew. He was producer and co-writer of Young the Giant's third album Home of the Strange and is also the musical director of Harry Styles's band, starting with his performance on Saturday Night Live in April 2017.
  
  Sound engineer and bassist Ryan Nasci, who is another member of Harry's band.
  
  One-time pizza shop worker Mitch Rowland, who lives with Ryan Nasci. When the original session musician dropped out, Nasci suggested Rowland to play guitar on the record and he ended up co-writing nine of the album tracks, while continuing to deliver pizzas between their sessions. Speaking in the documentary Harry Styles: Behind the Album, the One Direction star said:
  
  "The thing with Mitch is that something felt so new to me – he was someone else who had never done it before. He was working in a pizza shop and had never been in a studio. It felt like we had each other to walk out together. He was someone who had no preconceptions about me or who I was or anything and he's a legend."
• Harry plays the omnichord on this psychedelic track. The omnichord is an electronic musical instrument that was invented in 1981 by the Suzuki Musical Instrument Corporation. Popular in the '80s, it has subsequently been utilized by Damon Albarn on his Gorillaz projects and Arcade Fire on their Neon Bible album. Styles also plays the instrument on "Two Ghosts."