Anko is a 12-year-old shinobi apprentice of a modern age, secluded village in Japan. She trains everyday in order to surpass the strength of a man, but eventually becomes frustrated by the difference in physical strength. Refusing to become any more feminine, she decides to take a shinobi selection exam to serve the master of a famous family. Ninkoi is a modern age, ninja romance comedy!

(Source: Hakusensha, translated)