Japanese have a custom of sending greetings cards in summer, the hottest time of the year.Summer is also a time of swarming mosquitoes.This radio commercial for insect repellent is written in the form of a traditional summer greetings card.The theme is one of black humour as the writer, in irreverent impoliteness, recalls the fond memory of her old friend with the arrival of summer and the annoying mosquitoes it brings with it.