Haruka has always thrived in isolation, but being summoned to another world tests his loner status to the limit. Because he was late to the skill-selection party, he was forced to take every unwanted trait, including a skill that prevents him from joining a party. Abandoned by his peers and left to rot in the wilderness, Haruka uses his wits and his useless skills to outsmart monsters and nature itself. When he discovers his classmates are in mortal danger, the loner must decide if he will remain a hermit or become the hidden guardian of the very people who left him behind.