Power of lucis

After the battle and defeat of trihexa issei that he'll have a good life with his friends and harem but is ignored by his harem, friends , parents and is beaten the kendo club. Issei harem were dating and cheating behind issei. Issei leaves to from his so called friends and family. He is find by carbuncle and bahumut who chose to be the new king of lucis issei lucis caelum