He doesn't reunite with his parents/other heroes for a couple of arcs and when he finally does he runs away again... There is a chapter in this upcoming arc where you see his parents reflect on the fact that they treated him like shit and how all they want is to see their son again so they can have a second chance with him because they "love him more than anything". Sadith also DEEPLY regrets acting like that and pushing Eirth away so hopefully, they'll include all that regret from family & friends into the manga (His mom cries a lot
). The LN is really slow-paced, but so far the manga has been quick and refreshing so if that keeps up he may see his parents sooner than I thought.