"CIRCLE = CIRCLE" is a simulation adventure game where you participate in a creative doujinshi sale event. Enjoy the sale by selling books and talking to the characters. There are many unique characters at the sale event. Depending on the genre of the book sold at the sale event and conversations with the characters, New encounters and farewells await. Customers may not always come to the sale event. At times like these, spend your time drawing in your sketchbook. Sometimes customers ask me to draw pictures in their sketchbooks. This game is not just about selling books. It's also important to deepen your relationship with the characters.