At first glance you might think this is just goon art, but it’s actually more deeper then that. You see Peablaze big boobs overpowering sunflowers boobs is a metaphor for her love for pea shooter while sunflowers small boobs represent how she doesn’t truly want him.
Japan is absolutely inundated with malicious cults who do everything from scamming seniors to actual terrorism, which is what inspired so many games in the 90's to have cults as the villains. They're not supposed to be like, your local parish, or specifically Christianity.