Mushoku Tensei: Isekai Ittara Honki Dasu - Shitsui No Majutsushi-Hen

Mushoku Tensei: Isekai Ittara Honki Dasu - Shitsui No Majutsushi-Hen summary: After parting ways with Eris, Rudeus descends into a profound melancholy. He sets out on a journey that leads him to Rozenberg, the second largest city in the Principality of Basherant, in search of his estranged mother, Zenith. Despite his desperation, Rudeus is determined to pursue a noteworthy quest of his own to gain recognition. However, his fate takes an unexpected turn, and he ends up joining a group of B-rank adventurers known as the Counter Arrow. Among his new comrades is a girl named Sara, whose resemblance to Eris ignites a spark in Rudeus.