Succubus x Saint Final (uncen-eng) by AisStew - Adult Sex Game

A girl who was once a candidate to be a saintess, Liluna is involved in a ritual
of reviving the evil god and enchanted with an erotic curse.
Furthermore, the ritual's effect makes a number of unknown creatures show up
and the holy church where Liluna lives becomes isolated.
In order to stop the ritual, she has to get four "Orbs of Seal" in sightseeing spots
such as a historical ruin and a cave situated near the holy church...