Its the usual troupe of isekai of random HS but with an exception of the guy who has a devilish look but having a smile that even rivals Satan himself. 

His dream is to become a doctor to save as many lives however people misunderstands that they saw him to sell organs and stuff to the black market.

But before his dream of entering a good college university. He and other random HS gets isekaied to another world as heroes to which all three refused as they do not have any justification to save them except of course our MC. Who wanted to help people. 

He is given a cheat that can not only heal people but also bring them back to life. It would be awesome and cool but because of his look, they thought he is some kind of devil who those he helped had formed a contract with him and turned into mindless fanatics. 

Hilarity ensues. More misunderstandings and the MC misunderstood himself being a good guy.