Kick Back

Kick Back is the first opening theme song of the anime adaptation. It was composed and performed by Kenshi Yonezu.

Opening Animation
The opening starts with Denji pulling his cord, with a classical painting of a demon in the background. The scene shifts to Denji, Makima, Power, and Aki frozen still in the city before they begin to move.

Various scenes begin to play rapidly: Denji meeting Pochita; Kishibe pointing a gun; Chainsaw Man and Katana Man fighting; Galgali taking off a shoe; Aki and Denji backing out of a driveway; Kobeni climbing off of a table as Hirokazu gets on; Denji looking horrified as Power laughs in the background; Angel Devil sitting on stairs before looking up at the camera; Himeno and Aki standing on a rooftop; the main cast watching a movie, and Power stealing Kobeni's seat; Denji, Power, Makima, and Aki at a bowling alley.

Aki's bowling ball smashes into the pins, which rapidly transition into space before turning into a pin-up of Power on a beach. The camera zooms into Denji being walked like a dog before the scene is eaten by the Snake Devil as Sawatari and Katana Man's human form look on. The scene cuts to looking overtop a snowy mountain as the Gun Devil's bullet-tendrils swirl around before cutting to Denji and Makima in a library. Makima pets Denji as various plants begin growing on his body, and the camera cuts to his perspective as he stumbles towards Makima, who is revealed to be a reflection in water. The scene cuts to the two in the library again as Makima reaches towards Denji. A chainsaw emerges from his forehead as Makima does her signature pose. Denji transforms into Chainsaw Man as the scene rapidly cuts between his transformation and Makima feeding him a snail.

As the chorus kicks in, the scene cuts to Chainsaw Man fighting a Devil in the city. Power joins in, and Aki watches as Chainsaw Man is thrown into a building, his holes forming the letters CSM. The scene cuts to Chainsaw Man bursting out of the Eternity Devil before returning to the earlier fight. As Chainsaw Man watches, Denji's face flashes on screen before the camera moves to Power, who sends a large golden ball towards the Devil with her hammer as Chainsaw Man rides on top, jumping to finish off the Devil.

The scene then cuts to Denji cooking Makima's flesh before the camera zooms out of his apartment and returns to rapidly transitioning between scenes: Power walks away from Aki as an explosion happens in the background; a young Denji sleeps with Pochita; younger versions of Power and Denji play with food as a snow-covered Aki stands on a pile of snow next to them, with Makima standing on an even bigger pile of books to look over a wall; the Future Devil dances in its room; the Ghost Devil grabs a lamppost; Katana Man spreads his arms as blades swing around him; Power and Denji dance as Aki watches, before the camera moves behind them - Aki turns towards the camera and summons the Fox Devil, who devours the camera from off-screen and the anime's logo appears.

Kenshi Yonezu
I was given the opportunity to write the song "KICK BACK" for the anime adaptation of Chainsaw Man. I am honored because I loved the original work. This work has tremendous power, so it was very difficult to find a suitable sound for it. I hope you will enjoy it. Thank you very much in advance.

Trivia

 * Various scenes flashed at the beginning of the opening reference shots from various movies, referencing Denji's love of film:
 * Kishibe pointing a gun references Pulp Fiction.
 * Chainsaw Man and Katana Man's clash references Sadako vs. Kayako.
 * Galgali taking off a shoe references No Country for Old Men.
 * The scene of the main cast at a bowling alley references The Big Lebowski.