Nickelversion3
Credits to @MatheusAvancini and @MCijam to let me can get inspiration from their stories, now let go to info:
Y/N Midoriya is Izuku's older brother, always protecting his younger brother because Izuku is quirkless, even though he possessed inherited his father's quirk: All For One, his fate was end too quickly.... During one instance of protecting his brother from a sudden and overwhelming attack by a villain, despite being completely exhausted, Y/N used his last ounce of strength to shield Izuku from a fatal blow, and in doing so, he passed his quirk to Izuku. He didn't even get to see his parents and his childhood friends one last time, and still lamented about the unfinished business in his two favorite games...
Until his vision is floating in the unknown void and meet a unknown elder god. After a long talk, Y/N had been isekai to his favorite gacha game: Arknights, and also have a system, That it. This is about Y/N x Harem.