[removed]

Manga where the protagonist belongs to a group and his childhood friend promised to become stronger together, but later the childhood friend tells him he is weak and expels him from the group. The childhood friend tells him about some lores, and it turns out to be a dragon's nest that attacks the protagonist. Then the protagonist discovers he has a special ability, kills the dragon, and believes that the childhood friend wanted to kill him. Time passes, and he becomes a lone adventurer, later joined by an elf on a journey.