Soundless Knight

Instead of the legendary Boosted Gear, he wields the three legendary swords of Japan. Instead of an oppai loving pervert he is a deaf and unsociable teenager boy. Instead as Pawn he was reincarnated as the only Knight of Rias Gremory. For the first time Issei Hyoudou finally found a purpose in his life, to protect his master, become her sword and the strongest Knight of Underworld.