Finding 'lis all wounds visual novel' might be a bit of a challenge. First, check on popular visual novel platforms like Steam, but it might not be there if it's an indie or lesser - known work. Then, explore some of the dedicated visual novel download sites. There are also some communities on social media platforms like Reddit that are focused on visual novels. Post a query there asking if anyone knows where to find it. Additionally, keep an eye on crowdfunding platforms in case it was funded there and there are links to where it can be obtained.
Since this isn't a mainstream visual novel, your best bet would be to look on smaller, niche - focused platforms. Some indie game stores might have it if it has been released. You could also try searching on visual novel enthusiast forums or communities. Maybe someone there has heard of it and can point you in the right direction. Another option could be to do a very detailed web search, using different search engines and combinations of keywords related to the title.