Yuusha Party wo Oidasareta Kiyou Binbou: Party Jijou de Fuyo Jutsushi wo Yatteita Kenshi, Bannou e to Itaru

Orun, a member of the Hero Party, is suddenly fired one day for incompetence, and his former comrades dub him a "jack-of-all-trades." The dispirited Orun starts working alone yet his secret ambition is to go from being a jack-of-all-trades...to a master of all.

(Source: K MANGA)