In a world where might is typically valued over intellect, one man seeks safety above all. Transported to a new realm, he finds himself navigating a lush mountain teeming with unfamiliar flora and fauna. Evading a colossal slime and potential bandits, he descends the mountain only to be labeled a suspicious intruder upon reaching a castle. During interrogation by the female knight Ilius, discussions of the mountain bandits lead to Irias swiftly dealing with the outlaws. Faced with the choice of becoming a hero or cultivating a harem, the man simply yearns for security. His tale unfolds as he employs 'Understanding' as his primary weapon to survive this foreign land.