Yomei Hantoshi to Senkoku Sareta node, Shinuki de "Hikari Mahou" wo Oboete Noroi wo Hodokou to Omaimasu.

"You only have six months left to live." The third prince Carus was born with a "curse" imprinted on his left breast. And he was told at the age of ten that he had only six months to live. He fell into despair at the news of his impending death, but his life changes forever when the sage Gori appeared in his life. He became an apprentice to Gori in order to learn light magic, which can exorcise darkness and quell curses. Blessings and curses are two sides of the same coin. Ironically, the powerful curse that afflicted him also blessed him with immense magical power, enabling him to see spirits invisible to ordinary people, and he continued to grow at a remarkable rate. This is a heroic tale of a gentle boy who was cursed with death, and how he regained his life surrounded by blessings. (Source: Drecom Media, translated)