Sekai ga Café ni Nacchatta!

Happiness Encore and Sekai ga Café ni Nacchatta is the opening and ending theme songs of Is the Order a Rabbit?? ~Dear My Sister~ respectively. {| class="article-table" !Track No. !Track Name !Artist
 * 1
 * Sekai ga Café ni Nacchatta!
 * Sekai ga Café ni Nacchatta!

セカイがカフェになっちゃった!

 * Petit Rabbit's with beans
 * 2
 * Happiness Encore
 * Happiness Encore

ハピネスアンコール

 * Petit Rabbit's
 * 3
 * Coffee Cup de Escort​
 * Coffee Cup de Escort​

コーヒーカップでエスコート

 * Cocoa Hoto, Chino Kafū
 * 4
 * Sekai ga Café ni Nacchatta! (Instrumental)
 * Sekai ga Café ni Nacchatta! (Instrumental)

セカイがカフェになっちゃった! (Instrumental)

 * Petit Rabbit's with beans
 * 5
 * Happiness Encore (Instrumental)
 * Happiness Encore (Instrumental)

ハピネスアンコール (Instrumental)

 * Petit Rabbit's
 * 6
 * Coffee Cup de Escort​ (Instrumental)
 * Coffee Cup de Escort​ (Instrumental)

コーヒーカップでエスコート (Instrumental)

 * Cocoa Hoto, Chino Kafū
 * }

Trivia

 * Petit Rabbit's with beans is a unit consisting of Cocoa Hoto, Chino Kafū, Rize Tedeza, Chiya Ujimatsu, Sharo Kirima, Maya Jōga, and Megumi Natsu.
 * Petit Rabbit's is a unit consisting of Cocoa Hoto, Chino Kafū, Rize Tedeza, Chiya Ujimatsu, and Sharo Kirima.