Last year, developer Alicesoft announced they will localize and publish Evenicle 2 in the west. They released a demo titled Evenicle 2: Clinical Trial Edition on PC-via Steam to hold players off. However, even though that was released back in August 2020, Valve has delisted the full version of the game, which is a sign that it has been banned on the platform.
Source: N4G PC Looks Like Evenicle 2 Has Been Banned On Steam