The plot:
MC is a descendant of the hero bloodline, the man who saved the world from a powerful evil sorceress in the past. But he doesn't really do anything about the bloodline he has, and considers himself useless, especially compared to his little brother [but he doesnt hate/envy the lil bro tho] He has a girl he has a crush on, but in the end the lil brother is the one who ends up marrying her. He's heartbroken and moans about his heartbreak at a stone [i think] which to his surprise answers back. The stone asks him to release it, which he ends up doing. Turns out he had released the evil sorceress that had threatened to destroy the world in the past [the same one his ancestor defeated] The sorceress doesn't really get her full power back tho, and has to kiss the MC to get some of her power back. One way or another they end up traveling together to find all of her past companions back.
Sorry for the long ass desc. I know this manga/manhwa is not exactly popular but hopefully someone could help me find it.