During a blood moon that empowers demons, the heroine Leona is rescued from a monster ambush by Hain, a magic scholar. To grant her immunity to the moon's corrupting effects and boost her mana, Hain subjects Leona to a forced "Egg-laying Method" using his tentacle familiars. Despite her initial resistance, Leona is overwhelmed by pleasure and completes the ritual, securing her protection through a strange and erotic process.