Boukun Meika no Hangyakusha -Aster-

Ash devoted his life to serving his adoptive father, repaying the kindness of being taken in as an orphan. But at the moment of his death, he learned a devastating truth. Everything he had built—his efforts, his trust, even the ultimate power he was meant to possess, “The Seven Wings”—had all been stolen from him.
"…Very well then. This time, I will take back what was mine."

Original Webtoon