SHIRAISHI Shin

In the modern age where dungeons have appeared... In a world where everything is decided by a player’s blessing, Iijima Joji surprisingly gets the lowest aptitude of a G-rank Blessing. He had a terrible start as a player, being forced into debt by his friends and ridiculed for his incompetence. However, by chance, he was forced to participate in an unending tutorial… XX years have passed. He reached level 9999, but the endlessly repeating tutorial was about to break him. — and then his level increased. When he reached the other side of the countdown, the world was bugged, and he went back in time to the moment he woke up as a player, and he had to start his life over again at an extraordinary level. “Who is he? Why is such a monster working as a guild receptionist?” When he swings his arm, buildings disappear. When he casts magic, disasters occur. The overwhelming destructive power of the player’s guild receptionist is causing a commotion! The drama of a bored man in his 30s who is trying to turn his life around and get over it all begins here!!

To fight the monstrous "Outsiders" invading from outer space, the world's strongest Hero and Demon Lord joined forces. However, their alliance was ultimately defeated. In a desperate bid to change history, the Demon Lord, with the help of Hero's secret technique to reverse time and undergo reincarnation. Reborn as a boy who was bullied and enslaved in noble society, the Demon Lord now faces a cruel new reality. "Why is a slave so strong?!" "Strong? He’s not just strong—he’s a monster!!" With his overwhelming strength from his previous life intact, the Demon Lord trains relentlessly to rise to the top and ensure victory this time!