Aino Seiji is your typical high school student when he meets Guri, a shinigami! No, a pervert--no! An angel?! Guri introduces him to the Kiss Note and explains that if he doesn't kiss someone within 24 hours, she will die.
The group thinks they have found a pair of ideal targets. However, things get much more complicated when no one can agree if the intended couple really share each other's feelings.
Guri finally meets Seiji's younger sister, Akua and is surprised by her rather cold attitude towards her big brother. The cupid decides to learn more about what changed this once loving sister, and Yuzu is right there to help.
Yuzu will go to great lengths for her beloved older sister, Akane, even skipping her own lessons to watch over her. Despite harsh words from Akane, Yuzu refuses to relinquish her forbidden love even for someone like Seiji.
In a desperate struggle to find Seiji, Akane and Yuzu seem oddly worried when Guri tells them that he is off with Shikimi searching for her crush. The concern seems warranted when Seiji finds himself in the midst of a torture session with Shikimi!
Seiji, Guri, Akane and Yuzu have invited Akua to go with them to the beach. Akane tries to get Akua to go swimming with her in attempt to get closer to Seiji's little sister, but Akua gives her the cold shoulder.
Yoshino Aoyama
Guri
Kensho Ono
Seiji Aino
Manami Numakura
Akane Hiyama
Yūki Nagano
Yuzu Kichougasaki
Yumi Hara
Shikimi Shiramine