Shikkaku Ouji no Koukyuu Seifuku-ki: Maryokunashi no Ouji wa Koukyuu no Kisaki wo Mikata ni shite Gyokuza wo Ubau

In the Kingdom of Woodrow the royal line of succession is based on magical ability. Because of this, Prince Schwartz was sure he would never claim the throne since he had no talent for magic, unlike his twin brother. After losing to Weiss in a duel and spending 5 years familiarizing himself with every brothel the city has to offer, the "unworthy" Prince Schwartz is called back home by his father the King. It turns out his brother has eloped and the King wants him to impersonate Weiss in order to save the country from ruin. Could this be a chance for Prince Schwartz to finally win the throne? (Source: Mangamo)