A friend of mine suddenly turned into a monkey. It was one day during spring break, when everyone got together and started playing cards as usual. But for some reason, Takizawa was the only one who kept losing. As a punishment, he is made to drink whisky in one gulp, but as soon as he puts on a toy monkey mask, he turns into a real monkey. Kinoshita, who is now living with the monkey Takizawa, tries somehow to turn him back into a human, but without success. When the new school year begins with Takizawa still a monkey, Kinoshita becomes impatient and decides to make a last-ditch effort... What is human identity? is blended into the everyday scenery and cartoony setting without any sense of discomfort. The audience will find themselves moved by the seemingly ridiculous laughter.