Koisekai

 (コイセカイ Love World) is the 26th single released by ClariS from SACRA MUSIC. It and debuted at number 15 on the Oricon Daily Single Ranking.

The title song was featured as the opening theme for the TV animation Saint Cecilia and Pastor Lawrence and was available on digital music services from July 12.

The coupling song "Blue Canvas" was featured as the theme song for the Chinese version of the game application Blue Archive.

CD

 * 1) Koisekai (コイセカイ Love World)
 * 2) Blue Canvas
 * 3) Kimi ga Iru to (君がいると When I'm With You)
 * 4) Connect (コネクト) - From THE FIRST TAKE
 * 5) Koisekai [instrumental]

Blu-ray (Limited Edition)

 * 1) "Koisekai" Music Video
 * 2) "Koisekai" Dance Video
 * 3) ClariS HALL CONCERT 2022 〜Twinkle Summer Dreams〜 at LINE CUBE SHIBUYA Selection
 * 4) Twinkle Twinkle
 * 5) Alethea
 * 6) Masquerade
 * 7) Cynical Suspense
 * 8) ALIVE
 * 9) Connect
 * 10) PRECIOUS

DVD (Anime Edition)

 * 1) TV Animation Saint Cecilia and Pastor Lawrence Non-credit Opening Movie