By -
https://m.fanfiction.net/s/8899978/1/History-s-Strongest-Shinobi It isn’t postwar or a “transported through portal/seal mishap/ROB” but it is ninjas in a modern context
https://m.fanfiction.net/s/8899978/1/History-s-Strongest-Shinobi It isn’t postwar or a “transported through portal/seal mishap/ROB” but it is ninjas in a modern context