Matei Kyoushi to Juuzoku Shoujo no Haitoku Keiyaku

Joseph, the successor of the Great Demon Lord, became a teacher in the Wizarding Academy with the help of the demon princess Lilith who has the power of "love" that helps him to successfully ascend the throne, but the reason is to form a "sexual love bond" with some of his students!? (Source: Shueisha, translated)