Ice31's manga / #Military(4)

Ch5 So you're a special op agent who was tasked to protect a mother a daughter but failed and wanted to take vengeance. You eliminated everyone but the main villian. You died while trying and was reincarnated into the body of a boy who was picked on you, a year before their deaths. You still have all info and strength from previous life but this body stamina is weaker. You meet the family tog want to protect you militant way of thinking is hilarious