Erotical Wizard to 12-nin no Hanayome  

Erotical Wizard with Twelve Brides, エロティカル・ウィザードと12人の花嫁

Junpei Ichinose, a student at Tokyo Magical Academy, struggled to demonstrate his magical abilities. Suddenly, a stunning witch named Meryl appeared before him and declared: "You, the reincarnation of the Maou, are destined for..." This revelation left Junpei as the sole bearer of the power of the demon lord. Meanwhile, information about this secret was unintentionally shared with Sonia, a descendant of the hero. Despite being unfamiliar with how to wield it, Junpei managed to persuade Sonia to assist him in discovering the true potential of the demon lord's magic. However, as they delved deeper into the mysteries surrounding this enigmatic force, they learned that its name was "Ero Magic." Thus commenced their journey into a captivating harem tale filled with beautiful women and the potent spell of Ero Magic!