Ajisai Ai Ai Monogatari (紫陽花アイ愛物語; Hydrangea Love Love Story) is v-u-den's third single. It was released on May 25, 2005 and used as the opening theme for the anime Patalliro Saiyuki!. The single appears on the albums Petit Best 6, Suite Room Number 1, and v-u-den Single Best 9 Vol.1 Omaketsuki. The PV for Ajisai Ai Ai Monogatari appears on Petit Best 6 DVD, v-u-den Single V Clips 1, and v-u-den Single V Clips 2 ~Arigatou v-u-den Debut Kara no Daizenshuu~.