The story depicts a very ordinary protagonist who is troubled by work but grows up through plastic models. Riko Komukai is an average type in everything, including personality, appearance, favorite things, feelings and values. She works in an event planning company and belongs to the event 3 department, which is also called the "Noho Department" in the company. One day, Riko was called a mass production type by a colleague. At this time, she suddenly became interested in the model shop she found on the street, and saw the word "mass production type" written on it, and Zack, who appeared in the TV animation series "Mobile Suit Gundam", challenged to assemble a plastic model for the first time at the recommendation of the store owner.