From Evil Flowers:

Yamato, a boy who lives in Shirakami Mountain Village, Aomori; loves festivals. He visits the Tokyo Girls Collection, attracted by its title as “The BIGGEST fashion festival in Japan”. Although he doesn’t have a ticket, he manages to get inside. He encounters a fight between models, and successfully breaks it up. At that time, one person shows up and offers him an opportunity to work as a producer. Will Yamato be able to take advantage of this BIG chance…?!

Note: The series was published in Shuukan Shounen Sunday, and the compiled volume was released under Shogakukan's female audience imprint (Cheese!) Flower Comics.