Summertime

This song evolved from a riff developed by MCR bass guitarist Mikey Way. His brother, frontman Gerard Way, explained to Billboard magazine: "This song started with a riff that Mikey had always been working on and we kind of kept coming back to it. On 'Summertime,' whenever there was a moment we would just open the file and we really felt like we couldn't have the record without this song."

The song is informed by Gerard Way's relationship with his wife, LynZ of Mindless Self Indulgence, who gave birth to their daughter Bandit in 2009. Way said to Billboard magazine: "It's one of the lyrically personal songs on the album, whereas the rest of it is just me talking about my world view. So it's a really beautiful song and again, no rules. We can have a soft song. We can have a new wave song on the album."