This is from the manga about the dude whose skills are auto navigation and auto combat, meaning that he loses consciousness and then his body performs the most efficient actions to achieve the goal regardless of any other factor such as common sense or safety.
The character writing is as generic as possible, 1000% cookie cutter isekai junk. But the visual gags in the action sequences are often A+.
In this case, they're fighting an unbeatable dragon, and there's a multi-page bit including flashbacks to introduce a "mythril coated kitchen set" with a bonus gimmick knife that's normally proportioned but extremely tiny, which will become part of this unconscious dude's body's strategy for speedrunning this boss fight.