Hazure Skill: The Guild Member with a Worthless Skill Is Actually a Legendary Assassin, Vol. 3 LN: HAZURE SKILL LEGENDARY ASSASSIN NOVEL SC

In recognition of his skills and accomplishments, the guild master promotes Roland,
former legendary assassin, to the position of tactical advisor.

As Roland directs a large-scale quest at the behest of his superiors, however, he finds his
old companion Lina in a strange cavern―and a malicious force using her magical powers for evil!