This is a postcard set sold at the "été 10th Anniversary Exhibition" held at the Kaikai Kiki Gallery to commemorate the 10th anniversary of the restaurant "été" in Yoyogi-Uehara, owned by Natsuko Shoji. The exhibition featured collaborations with three artists who have connections with Shoji. Takashi Murakami, who has previously collaborated on cakes, provided his Kaikai Kiki Gallery as the venue. Azuma Makoto, who runs the custom-made flower shop "JARDINS des FLEURS" in Minami-Aoyama, created flower arrangements inspired by Shoji's cakes, which were displayed in nine boxes alongside the cakes. Additionally, graphic artist VERDY designed the title logo for the exhibition.