SmArt Joy's Last Origin released an event-tied album called Project ORCA. SJ released said album on Bugs!, a Korean music streaming thing.
SJ said they would give stuff to all players if any song on the album make it to top 50.
All songs in the album dominated the top 6 in the chart, beating out popular Kpop band like BTS, and shocking even SJ itself.

In a strange, heartwearming way, the songs inside the album were made in-lore by Sky Knights and Muse. Muse is a bioroid who despite was designed to make songs and to entertain, was implanted with social phobia and introverted personality that keeps her out of the spotlight and reduces her into a ghost writer. She was compared to that of Sisyphus, forced to roll a boulder up her hill but never being able to set it on top as her hardwired fears block her from completing the deed. And that was true in the pre-destruction world, but now thanks to the Commander (IE: Us), she was able to realise her dream of being recognised on stage and performing her heart out.