The Dragon Core For A Siren

Summary

In seven days, I will marry the Empress of the Shadow Realm.

The War Goddess and the Holy Princess, who once begged to be my wives, remain blissfully unaware.

They are currently preoccupied, joyfully preparing a lavish birthday gala for their new favorite pet, a siren.

Once, to preserve the peace of the three realms, I volunteered to guard the Abyssal Void for a thousand years.

Before I left, they promised me that upon my return, they would serve as my closest guardians, never to be parted f