The Terminally Ill Hero's Husband is the Demon Lord

Summary

The Demon King appearing in the Gray Mountains is beautiful and benevolent, so one must be cautious.Yours is a blessed land nestled under the Gray Mountains and surrounded by the bifurcated Abeb River.Founded by Rachel Angmar, the hero who defeated the Demon King, and blessed by the god-loved Archmage Gil Kashtra, Yours has enjoyed an era of peace and prosperity for five hundred years.Who could have ever imagined that a Demon King would suddenly appear after just five hundred years?The one who volunteers to subdue the Demon King all alone is the hero, Gillian Arche."You shall never become a father,""You shall die in solitude,"and "No one shall remember you."Burdened even by the curse of twilight, will this introverted hero be able to defeat the Demon King and protect the peace of Yours before his life runs out?