I understand it was abandoned, as far as I know anyway, but even without the domain, surely the developers left stuff on a public repository.
Is this the latest repository here? https://sourceforge.net/projects/lipsofsuna/
or is it here? https://gitlab.com/xenodora/lipsofsuna
I'm not planning to raise it from the dead or anything, but it would be good to know in case someone does want to in the future.