Fuuko is a happy and cheerful girl. One day, two cousins, Daiya and Ichi, move into the apartment upstairs. Cold Ichi and mischievous Daiya gave a very bad first impression. All three are going to the same school as well. How will Fuuko's high school life turn out? Included one-shot: Volume 1: Frill Volume 2: Happy shiteru? (Are you Happy?)