Necromancer's Lover

Accessing the secret knowledge of the great magic academy was a mistake for the young couple namely Aliceteria and Ban. The book where they have known the knowledge they had never known in school was cursed and now that it's been opened it spread out in the land a great miasma spread causing famine and death to every single one it encounters. To contain it Aliceteria tried to suppress the curse using her magic she contained half of the miasma lessening it's power to bring death to every single being. She then fell into a deep sleep as good as dead now Ban needs to go on a journey to find Sousetsuka the caster and revert everything back to normal again. Will he be successful or will he fail in the process.