Swear ~Night & Day~

 is a song by Roselia.

It is the title track of their 12th single, with Our Carol as the coupling track. It was released on October 26, 2022. The limited Blu-ray edition included two discs, each containing recorded footage of Episode of Roselia. The first-print edition also included a lottery ticket for BanG Dream! 11th☆LIVE.

It is the gift song for the event The Long Night, Embracing Eternity.

It was written by Oda Asuka, and arranged and composed by Takeda Yusuke.

Video
Single Preview = Live Performance =

Live Performances

 * September 22, 2022: Sonnenschein
 * February 5, 2023: Sternenzelt Nocturne