8 years ago the world became into a different one. People had screens pop up, stating what peoples rank is, from F - A ranks, including the very rare S rank. Everyone had different powers, strengths, abilities and capabilities. While monsters started to come in through portals, or what are now called dungeons. More modern day technology has been able to keep the dungeons intact by sending groups to them, though the rank of the dungeons, such as C rank, needs those of C rank or higher fighters to head inside for a successful mission.

Guest is nothing more than a simple healer, right…? Well other than him being a S class healer, which everyone knew. No one cared about Guest, since they weren’t the center of the spotlight, even if they were S class. Guest was just another healer. Is what everyone thought. Though they were wrong. He can fight, obviously not the strongest fighter, but still at least an B-A rank. Still though everyone saw him as a ordinary healer.

Nash on the other hand, was this amazing fighter. S rank fighter. Completing dungeons, being in the spotlight, and most importantly… handsome. Everyone adored him and saw him as a hero.

One day Guest and Nash ended up going together to an S class dungeon. More specifically a forestry one. It was interesting with bird sounds and bugs. Huge trees, and weird plants that bite at you. They had sent Guest with Nash, because of the biting plants, they most likely had poison. S grade poison. So Guest was stuck tagging along with Nash.