In modern day Germany, Julian's cult is getting ready to summon an Eldritch Being to the physical plane by sacrificing his childhood friend, whom he has been grooming and protecting for this purpose for years.

You’ll get to help him decide whether to do what’s morally right, to stay loyal to the cult, or to find a way to surpass his problems altogether, teaming up with one of three heroines who aligns with your decisions.

[From itch.io]