Chronus Re:Hero ~The tale of two against their fate (part 1)

Ranz Blair is eldest son of Duke Hawkins Blair who serves as Vanguard of imperial army of Astoria kingdom. He was shunned by society due to not having talent or affinity to any of the ten elements of magic. His half siblings always protected him, resulting in his low self esteem. Ranz had only one person he considered his ally, his childhood friend Symphia Orland, the daughter of Prime Minister.
However when he reaches age of 28, the world comes to an end with awakening of Kylos, The Demon lord of Dystopia who takes over the prince Neon Gai Astoria. Ranz survives due to being imprisoned by Symphia in her dimension prison. After venturing the destroyed world alone for years, he finds ancient weapon of time- Chronos Saber. He goes through time leap several times to prevent end but failed. On his 25th try he leaps to his age of 16 where he plans to overthrow the awakening of Kylos.

This is a journey of a boy who started a revolution against time with his new found power.