The Hero Laughs While Walking the Path of Vengeance a Second Time, Vol. 1 (manga)

Kaito has been summoned into another world as a hero, and though all goeswell for a
time, one day his entire party betrays and mercilessly kills him.So when he suddenly
gets a chance to redo his life, starting from the pointhe was first summoned to this
world, he swears to exact vengeance on everyonewho stabbed him in the back...