The Cup Noodle Collaboration was a collaboration between Nissin Foods' ramen brand Cup Noodle and Project SEKAI. The collaboration involved five songs being commissioned for the game, a login bonus for the Cup Noodle boost item, promotional illustrations, and a special episode of Petit SEKAI.
The login campaign for the Cup Noodle item ran in the JP server from January 13th to February 7th of 2022, while the song campaign for the commissioned songs ran in the JP server from May 1st to May 5th of 2022. Globally, the login campaign did not happen, but the song campaign of the commissioned songs still ran from May 2nd to May 6th of 2023.