Mushoku Tensei II: Isekai Ittara Honki Dasu

Eris's sudden departure leaves Rudeus Greyrat devastated and convinced that what they shared meant far less to her than he believed. Carrying that pain into the Northern Territories, he continues searching for his missing mother while moving through each day with little feeling, trapped in memories of a relationship that ended without explanation. In a land this dangerous, however, despair is a weakness he cannot indulge forever.

Joining new adventurers slowly pulls Rudeus back into the world, and a brush with death forces him to reconsider what he wants from his second life. His journey becomes about more than finding his family: he must recover the confidence to trust himself and others again, and learn how to truly live instead of merely continuing.