She's Gonna Have a Bad Time | A Ninja and an Assassin Under One Roof

On the way home from school one day, Konoha Koga rescues Satoko Kusagakure, a ninja who escaped her village. Pursuers from the village arrive in search of Satoko, but Konoha deftly deals with them. It turns out the unassuming high schooler is actually an assassin, setting the stage for a potentially cutthroat cohabitation of a ninja and an assassin.