Anti-Japanese War Gunfire

How can an ordinary college student survive in the era of war when the war is raging? Fortunately, you carry the "Reverse War" system with you and don't have a gun? You can choose from Blue Dragon, White Tiger, Suzaku Xuanwu. Do you want to play sniping? Holy Light Judgment Atomic Power Chaos Xingtian Don't be polite to me, little Japan has tanks? Is a stack of C4 bombs enough? We have guns and a team, how can we do it alone, Sophia, Angela, Amy Barbie, Runtu... Ahem... So, brave young man, go and create a miracle! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.