Ninpen Manmaru  

忍ペンまん丸, Manmaru the Ninja Penguin

At nenga's ninja school, manmaru learns how to assassinate with foxes and raccoons under the guidance of a bear master. he becomes entangled in a rivalry between nenga, koga (monkeys), iga (dogs) schools, as well as facing temptations from dobe, a group of dropouts from nenga who also study there.