Mushoku Tensei: Isekai Ittara Honki Dasu - Shitsui no Majutsushi-hen

Rudeus experiences a deep emotional downturn following his separation from Eris and journeys to Rozenberg to locate his missing mother, Zenith. In his desperation to establish himself, he attempts to take on a high-ranking quest alone. By chance, he joins forces with a group of B-rank adventurers known as the Counter Arrow. Among them is a girl named Sara, who bears a resemblance to Eris. This manga adaptation covers the events from the seventh volume of the original novel, focusing on the developments after Rudeus and Eris part ways.