Inside a medium-boss room of an RPG game that he played again and again until he can get there with his eyes closed. Waiting for a hero, a demon who exists only to be defeated, got his former life memory revived. Knowing that, in his previous life, he was a nothing-special college student- Continuing to stay as a to-be-defeated mid-boss is a no. The determined him, decided to defeat the boss and escape the dungeon. That which was obtained in the process was a doping item called "pearl piece".The demon, who was ordered by the goddess to collect the 15 pearl pieces that was scattered around the world, decided t...Show more