Immortal Slayers

What happens when you survive a death game? Maru didn't expect to be sent on a mission to save the world and to be executed at the end of it all. But with a heartfelt wish on the line, he decides to participate anyways.
With the help of their overpowered leader Stella, their resident muscle head Artes, the big brother figure Atuya, the glasses pervert Willian, the cool beauty Ajin and the 'hot and cold' little sister Shenji, Maru goes in a journey to slay the mysterious Immortals. What could possibly go wrong?