An Eldritch Horror Has Fallen in Love?! is not a horror story.

For years the government has secretly placated an eldritch horror beyond their understanding with human sacrifices. Our protagonist, Petre Predav, is chosen as a sacrifice, but rather than devour and destroy him, the eldritch horror becomes infatuated with him.

The story follows:

1) Petre as he learns about the the eldritch horror, and

2) the government's response to the eldritch horror's behavior