A NEET's Guide to the Parallel World: Healer, the Strongest Cheat?

Right after jumping off the roof Masamune was caught up in his classes transition to a new world. A throne hall.The students had all received high-class jobs such as Sage or hero. Except for Masamune, who became a healer, the weakest known occupation. Cursed at and called incompetent, he alone is banished. After wondering the darkness, Masamune who received the skill [mischief inversion {extreme}] through inverting the healing magic gained the ominous magic [Encroachment Wave].Now the strongest, Masamune swore his revenge.Demons and the white cat tribe, precious companions he met on his journey. Together they explore the new world.