Okusama no Kaifukujutsu The Animation

Shion, who has not manifested magical powers even after becoming an adult, is entrusted to a young couple engaged in magical research for treatment. After a certain incident, his magical powers finally manifest, but he cannot control them, and Rui, a healing mage, takes care of him. However, to be able to handle magic fully, he needed to become an adult in a sexual sense. Rui, being a married woman, couldn’t graduate Shion from his virginity, so they proceed with preparations under the condition that they continue until he gets a girlfriend…