Thank you, we are working on Steam support, but it has been delayed and will take some more time.
DLsite is one of the web sites where LovelyComposer can be purchased overseas. Is it possible to access it?
https://www.dlsite.com/home/work/=/product_id/RJ331224.html/?locale=en_US
(Are there a lot of people in the world who can't buy on itch.io?)