Tsukasa is a salaryman who keeps changing jobs in search of better conditions. After a challenging final interview with a large company, he found himself transported to another world. He is disheartened as his past work experience is completely useless....... However, he was given the unique ability "Job Changer" instead! With the power to switch freely to any class, including swordsman, sorcerer, lancer, alchemist, appraiser, and pharmacist, he begins a comfortable life in another world. He is equally skilled at sorcery, cooking, and fighting, even when dealing with demons! From medicinal herbs to magical items, he makes effective use of his abundant knowledge! He also demonstrates his adaptability, helping people and earning money along the way! This is the start of a career-building fantasy where a smart company man makes full use of all the different jobs available! (Source: Corona Ex, translated)

One day, the high school student Okumura Kagerou was suddenly summoned to another world alongside his classmates. He received the class "Trap Master", a doomed one, which was looked down upon as a failure. While the heroes and swordsmen were celebrated, Kagerou was deemed useless, eventually being betrayed by his companions, who cast him aside in the deepest depths of a dungeon. There, he resigned himself to death when he found the demon lord, Aruel, sealed within a crystal. After learning the truth of this unjust world, Kagerou formed a contract with her and awakened his dormant power. The trap skills that were once riddled with restrictions were unleashed, evolving endlessly into the most powerful traps. This is the story of a forsaken, failed class rising up against injustice; an underdog becoming peerless fantasy!

"I'm going to master every job I can!" Tsukasa, a salaryman who was thrown into another world with nothing but the clothes on his back, obtained the power "Job Changer." It is an unusual power that allows him to become any class he wants for different jobs⁉ In his past life, he was a job hopper who was always looking for a better job, hoping to find the perfect job for himself! Now as a Swordsman or Wizard, he becomes famous as an adventurer by defeating monsters one after another!　 As an Appraiser or Alchemist, he can make a fortune by collecting rare medicinal herbs and mass-producing potions!　 However, a major threat looms over his smooth life of success in this other world.......? A smart salaryman makes full use of all seven different jobs to reach the top in this career-building fantasy! (Source: TO Books, translated)