https://www.protondb.com/app/1284820?device=any
https://github.com/ValveSoftware/Proton/issues/8471

ProtonDB entries for Desktop Kanojo, Desktop Mate, and V-Pet simulator all complain about the part of the program that should be transparent, being black instead. The link above is my github issue for this. However, I'm very unfamiliar with launch options. Is there a proton launch option that might fix this issue?