The setting is a convenience store that attracts the largest number of customers in Japan among a certain chain of stores for three days in mid-summer. Many people are on their way to the Comic Market (Comiket), a subculture festival held nearby. The store serves as a front-line base for buying drinks and other items. Young people immersed in the dream world of anime cosplay and office workers who make it their life's purpose to meet up with their game-loving comrades come and go. The human drama of the convenience store is agitated by the "Summer Comic Market.