Petopeto-san (ぺとぺとさん?) is a light novel series by Kou Kimura, with illustrations by Yug. An anime adaptation ran from July 9, 2005 to October 1, 2005. The show takes place in a Japanese school where everything is normal, except for students from what are called "specified races." The specified races are based on yōkai from Japanese mythology; for example, one student on the swim team is a kappa, while another, a nurikabe, merges with walls and is popular in the summertime for having a very cool temperature.
- Shingo is a human. He is a good cook, and is not racist against different races. He cares for Petoko a lot, and does not want her to disappear, so helps her a lot.
Hatoko "Petoko" Fujimura
- PetoPeto race. Her main source of food is love. With lack of love or food she becomes transparent, which would eventually cause her to disappear.
- She is half-Kappa race. She is a good swimmer, and faster than humans. She likes Shingo.
- Kappa race. she is Kuguru's sister, who wanted to kill her sister because she believes the family only needs one heir. She and her sister later went back to good terms.
- Human. Shingo's little sister. She seems to hate the special races, or for her they are monsters.
- Hello-san (Originally aired July 9, 2005)
- A Special Race (Originally aired July 16, 2005)
- Mint or Lavender (Originally aired July 23, 2005)
- Family Matters (Originally aired July 30, 2005)
- Younger Sister Village (Originally aired August 6, 2005)
- Older Sister and Younger Sister (Originally aired August 13, 2005)
- Ding-ling Ding-ling (Originally aired August 20, 2005)
- Summer Camp (Originally aired August 27, 2005)
- Police Chief for a Day (Originally aired September 3, 2005)
- Scout (Originally aired September 10, 2005)
- "Imo-ten" Test Trial Version (Originally aired September 17, 2005)
- Project Daybreak (Originally aired September 24, 2005)
- Good-bye, Petopeto-san (Originally aired October 1, 2005)
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