Basically a (M) American soldier is iskaed into the modern world where he must survive this new world. He meets old friends and enemy's along the way. He could work as a history teacher or he could just do whatever. He has these main characters of interest His two best friends from America (M) and tusndere (F) from england , a (F) Hindere Russian sniper, a yandere (F) Japanese soldier, and a German rival (M).
Once again in the end it would be y'all own story to write.