|Season 2, Episode 9|
|Air date||September 1, 2012|
|Episode Director||Masami Furukawa|
|Animation Director||Miho Tanaka|
|Ending||Natsu no Yakusoku|
DD2 Episode 8
DD2 Episode 10
Union Fest (ユニオン・フェスタ Yunion Fesuta) is the ninth episode of the second season of the Dog Days series. It first aired on September 1, 2012.
At last the special event featuring Biscotti, Gallete and Pastillage's armies begins. Éclair is avoiding Shinku since the cat thief incident, while Rico figures that she is in fact denying her true feelings for him and confronts her about it. Upon taking heed of the situation, Leo challenges her to a duel during the first round of the festival, claiming that Éclair cannot win against her as long as she keeps such hesitation in her heart.