How strong is this boy who’s already been reincarnated not once, but twice in this adventurous isekai manga?! "I was reincarnated again." Rex, a reincarnated boy with two past lives—a Sage and a Hero. Having learned the dangers of standing out from the memories of those lives, he vows to live a simple third life as an Adventurer. But that "simple" is way too "extraordinary" for normal people! So begins the start of a new action-adventure fantasy game, staring the strongest boy with no self-awareness, overwhelming the people around him!