Morning Musume.'22 will release a double A-side single titled "Swing Swing Paradise / Happy birthday to Me!" on December 21. 

The group's 72nd single will be their first for Sakurai Rio, who joined the group in June, and last for Kaga Kaede, who will be graduating on December 10. On the single, Kaga commented, "This will be the last time singing Tsunku♂-san's song, so I will sing it with care." 

The single will be released in five different versions: Limited Edition A, Limited Edition B, Limited Edition SP, Regular Edition A, and Regular Edition B. Limited Edition A will include the MV and making footage for "Swing Swing Paradise," while Limited Edition B will include the MV and making footage for Happy birthday to Me!" Furthermore, the Limited Edition SP will come with footage of the two songs featuring Kaga as well as an interview video.

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CD (All Types)

01. Swing Swing Paradise
02. Happy birthday to Me!
03. Swing Swing Paradise (Special Edit.)
04. Happy birthday to Me!

Blu-ray

Limited Edition Ａ

01. Swing Swing Paradise (Music Video)
02. Swing Swing Paradise (Dance Shot Ver.)
03. Swing Swing Paradise (Making Footage)

Limited Edition B

01. Happy birthday to Me! (Music Video)
02. Happy birthday to Me! (Dance Shot Ver.)
03. Happy birthday to Me! (Making Footage)

Limited Edition SP

01. Swing Swing Paradise (Kaga Kaede Solo Ver.)
02. Happy birthday to Me! (Kaga Kaede Solo Ver.)
03. Kaga Kaede Interview (Tentative)