[Machine Translation] A VRMMORPG that combines abilities called "Senses" and aims for the strength of the "Only Sense Online" - "Only Sense Online" A minor sense in the northern area Yun and Tak, who have been taught "mountain climbing", discover an unexplored "highland" field at the top of a steep cliff. The OSO players are excited to conquer the field, but Yoon's attention is drawn to a rare ore that can only be found in the rocky mountains that rise above the plateau. Just as they were about to ask the magi to appraise the ore, a huge roar echoed around them! It was the "Grand Rock," a super-dreadful MOB that had been mimicking the rocky mountain! Challenge yourself to smith new weapons and face an enemy that is impossible to defeat!