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During the school trip Touka and his classmates are summoned to another world. However Touka was the only with the lowest rank: E-rank. An overwhelming low status when compared to his classmates. Thus the former mob-character and abandoned hero, will absolutely become the strongest devil as he advances and strikes back.
An orphan girl Ren encountered an accident on the way to being sold, and the shock brought back her memories of her previous life! "I was an old man!!!" Yes, Ren's previous life was a researcher in his 30s who died in an accident, reincarnated as an orphan girl, and lived until now !! In order to escape from the merchants, he uses his hidden magical talent and scientific knowledge from his previous life to survive alone in a harsh different world.
Alvis, the hero, lost his life in a battle with the Demon King. However, he lived on... as a skeleton!?Ending his career as the hero who defeated the Demon King, he spent 3 years sleeping, playing and enjoying every day. However, in order to find his long time friend, Izana, he once again enrolls as an adventurer, and changes his name from Alvis to Al the Skeleton. Due to his appearance being that of a skeleton, trouble is not out of the question in his near future!Protecting travelling merchants, mapping unexplored dungeons and so on; whilst undertaking numerous requests, Al the Skeleton wields his sword another day in order to save lives.