The Rebirth of a Mercenary as a Special Soldier

A mercenary in his previous life was reborn as a wealthy young loser who was thrown into the army by his family, and he was in a weak body? Impossible, let me show you what it means to be strong. What can't you do? Just kidding, the training I have experienced is not comparable to that of your new recruits. Call me a playboy and incompetent? I admit this, I do have a bit of a temper, but I am incompetent, so just compare. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.