I Asked You to Go to the Earth to Kill People, Why Did You Just Kill the Little Devils?

This is a world where you can become stronger just by killing people. Everyone will awaken a world destroyer system when they are sixteen years old, and the awakened person will awaken an identity and a profession in another world. The more kills you kill, the stronger the combat power will be rewarded by the system. Someone transformed into a rainy night butcher and became a terrifying legend in the city. Someone transformed into infected person zero and spread dozens of plagues. As for Chen Qingyuan, he was bound to the most useless profession - Moon Blade Master. It's not fatal when hitting enemies, and the amount of healing you get when hitting teammates isn't high. Just when he fell into despair, he discovered that the place he traveled through was a bit strange. Isn't this the Blue Star in 1937? Yes, it was the year 1937 in the history books, when the country was ruined and the family was destroyed, and the country was in turmoil. After rescuing a female student from the Japs, Chen Qingyuan was shocked to discover that as long as he killed a Japs, in addition to enhancing his combat effectiveness, he would also receive a special bonus called "merit". Just when others were suffering from natural disasters and bad luck due to too much slaughter. Chen Qingyuan was not affected at all. Not only that, because all the people he killed were Japanese, he also gained merit, his luck increased dramatically, and he was blessed with longevity! At this moment, Chen Qingyuan realized. It turns out that the tens of millions of devils in Sakura Country are my golden fingers, and they must be kept in captivity and killed slowly!