Description
Vol. 1 without any fixes as it stands does not play the opening video on Proton GE.
Standard kirikiri wisdom is to disable the media converter, however from my testing that seemed to bring the audio back, but the video still wouldn't play (black screen). The classic quartz, wmp11 and qasf combo does however bring both video and audio back. (I might have tested things weirdly however, for media conversion I just set the STORE to none and UMU_ID to tenshi-sz (another game with disables media conversion).)
I assume that Vol. 2, Vol. 4 and AFTER will also have the same issues, although I'm not sure about Vol. 3 quite yet as its on a different engine (CatSystem2) for some reason.
Noting my testing has been done with the Denpasoft copy, not the Steam copy. Should be the same however in terms of fixes