Saintess Eruna and the Lustful Book of Corruption

Eruna, a young woman, finds herself possessed by a powerful succubus that emerges from a sealed book. To suppress the demonic entity inhabiting her body, she must consume "love potions"—but these substances pose their own threat to her autonomy and purity. The game follows her struggle to resist both the succubus's influence and the advances of those around her while trying to maintain control of her own body and destiny.