My Status as an Assassin Obviously Exceeds the Hero's

Summoned to a different world with his peers, Akira Oda is given the traits of an ordinary assassin due to his unassuming nature. However, his skills prove to be far superior to those of a hero.
Akira soon becomes suspicious of the king who has invited them to this alternate world, and must use his skills as an assassin to unravel the mystery... and uncover the conspiracy afoot!