Review Detail of 1_am_stick in I Became Invincible After Sweeping The Floor For 70 Years

mc is behaving contradictory to his on belief as he thinks he is not real prince so he has nothing to do with royal family but remember that one of his brother good to real prince so he helps him become the king but he doesn't even meet the the real prince mother as he has no feelings for real prince mother....... Really?