While preparing for a class play, centaur Himeno Kimihara, who is playing the princess, ends up kissing her demon friend Nozomi Gokuraku after a male classmate who had originally hoped to play the prince role modified her script.

After finding Himeno modelling in a fashion magazine, Nozomi is roped into trying out some different fashions by Mitsuyo Akechi and her girlfriend Inukai after they hint Himeno might get expelled for having a part-time job.

Himeno goes out with her cousin Shino and comes across student council president Manami Mitama and her three triplet sisters, Chiho, Chinami, and Chigusa. Shino gets defensive about how the triplets go about kissing others, which isn't helped when Mitsuyo and Inukai provide their own input on the matter.

After being approached by a boy with a love letter, Himeno is reluctant to accept it because she is worried about how her horse half would look naked. Hearing about her complex, Nozomi and Kyouko propose that they look at each other's private parts to put Himeno at ease.

Himeno feels intimidated by Sassassul because of a scary B-movie she saw about snake people as a child. After hearing about this, Sassassul requests to watch the movie in question with Himeno, assuring her that her species is nothing like the monster featured in the movie and managing to become friends with everyone.

As the girls discuss what kind of hairstyle would suit Himeno, she explains how her ancestry led her to have red hair.

he girls all go to the pool, where Sassassul overcomes her fear of water and understands more about Manami's sisters.

Himeno and the others are chosen as a preparatory committee for Jean Rousseau, a French-raised amphibian businessman who is scheduled to give a speech at their school. While visiting his homeland prior to his speech, Jean is concerned by his people's willingness to rage war against mammal-based lifeforms.

Hime, Nozomi, and Kyouko decide to tail after Sassassul as she goes on a supposed date with a boy to a contemporary art museum, unaware that various organisations are keeping an eye on her too.

After learning about different types of grass and flower from Himeno, Shino attempts to explain the concept to her classmates at kindergarten.

The girls participate in an RPG fantasy setting, fighting against monsters in a dungeon labyrinth, which turns out to be a story written by Mitsuyo.