Bokun Meika no Hangyakusha: Aster

Ash had devoted himself to his adoptive father to repay the debt of gratitude he owed for being taken in as an orphan. But the truth he learned on his deathbed was quite different. All his hard work, the trust he had built, and even his innate, most powerful ability—the “Seven Wings”—had been stolen...

Source: MyAnimeList