半蔵と十三人の女忍たち

Hanzo, a war orphan left all alone, is taken in by the female ninja Yato and raised as a ninja. However, the beautiful and adorable Yato has a strong and ferocious temper!! She teases and tempts Hanzo!! Then, a tragedy strikes the two of them, shattering their fun, festival-like ninja life... (Source: Champion Cross, translated)