非戦闘職の魔道具研究員、実は規格外のSランク魔導師 ～勤務時間外に無給で成果を上げてきたのに無能と言われて首になりました～ Raw Free

A non-combat magical tool researcher who is actually an extraordinary S-rank magician - Despite achieving great results outside of working hours and without pay, he was called incompetent and fired