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.
After joining forces with Akris and Hain to fight the demon king, Leona is subjected to a provocative ritual to increase her strength. However, the group is soon ambushed by Youki, who uses sadistic magical tentacles to strip the women of their memories and identities. Broken and reduced to mindless "seedbeds," Leona and her companion fall into despair as they are claimed by the demon's cruelty.
Hain bypasses a priestess's sacred protections to extract her mana through unconventional means. Meanwhile, Rin Bell is targeted and poisoned by enemies, forcing Hain to employ a risky and intimate detoxification method involving the implantation of a guardian egg to save her life.
After introducing the new companion Ferris, the Master encounters Claudia, a disgraced knight bound by a servitude choker and broken by betrayal. Seeking to recruit her, the Master overwrites the curse of her choker through a carnal ritual involving tentacle restraint and egg implantation. This process binds Claudia to him and results in the birth of yet another ally.