Boku no Kawai Musume wa Futago no Kenja - Tokugi ga Debafu no Teihen Kuro Madoushi, Sodateta Futago no Musume ga S Rank no Dai Kenja ni Natteshimau

Synopsis:

Due to his lack of skill in offensive magic, Elcan, a dark magician, is expelled from his party. He discovered twins who had been left by their parents while he was out on the streets. "I want to improve their lives, but I am not a good black magician." He made the decision to become a father to these two daughters and to give up his life as an adventurer. Consequently, he brought up his daughters, Selena and Corona. enrolling them in a prominent magician's academy and teaching them dark magic. The sisters return to see their father with some significant news after learning more about magic. Are they Sages of the S-rank? And they wish to join him in a party? A man and his daughters embark on a new journey!