Hey, I appreciate the report. To create this project I've purely used Koikatsu, Ren'Py, and VsCode so I can assure you no trojans or other such viruses have been added by me.
After a bit of research, Win32/PornTool seems to be a grouping that Malwarebytes defines as:
'Porntool. is Malwarebytes’ detection name for a category of trojans that are designed to display adult content on the users’ computer, or to be used to search for adult content (in case of a Toolbar).'
I'd say that it's a false detection in this case, as this is an adult game, so of course, it would be trying to display adult content.