is a Japanese manga series by Mayu Sakai. Peter Pan Syndrome was serialized in the monthly manga magazine Ribon from December 28, 2004, to September 3, 2005.
Kohaku Hasumi, a first-year middle school student, has telekinesis that allows her to fly and levitate when there is no sunlight. Having moved to a new town to search for her mother, Kohaku is under the orders of her father, Rin, to keep her abilities a secret else her family will move to a different town. During one of her evening searches for her mother, she accidentally drops her cell phone on the balcony of the top floor of an apartment building, which is occupied by the family of twin brothers Yà «ro and Akari Tachibana. Upon her first day at her new school, Kohaku meets the twins and finds her cell phone with them. Despite clashing at first with Yà «ro, she uses her flight abilities to save him when he is accidentally pushed out of a window and falls. Developing an unlikely friendship, Yà «ro promises to keep Kohaku's abilities a secret and help her find her mother.
To search for Kohaku's mother, Yà «ro cooperates with her by using resources from the hospital that his family owns. As the two become closer, Kohaku learns more about his personal life and his mother's expectations for him to become the family hospital's next chairman, while Yà «ro slowly grows fond of her. Kohaku realizes she is in love with him, but he is dumbfounded by her sudden confession and rejects her. When Tà Âko Kagami, a girl from Kohaku's childhood who has strong telekinetic abilities, returns to her life and romantically pursues Yà «ro, Yà «ro realizes Kohaku is important to him.
Tà Âko warns Kohaku that her own abilities are fading and that people from the research facility they both grew up in are in town. Once Kohaku is discovered and targeted by the research facility, Rin reveals that, as a result of being able to fly, a side effect is that she will never be able to age. Yà «ro admits his feelings for Kohaku, but because she will never age, he is fearful about their future together. Wendy, Kohaku's cat, reveals that she is Kohaku's mother, who used her telekinesis to transfer her consciousness to a black cat when she was about to die from giving birth to her. Wendy gives Kohaku the choice between the options of fleeing from the research facility, staying with them, or sacrificing her abilities to live a normal life. Kohaku ultimately decides to leave with her family, while the research facility decides to let her be free. She and Yà «ro bid each other farewell and promise to meet again in the future.
Four years later, Yà «ro has become a high school student and has been taking his studies seriously in order to pursue medicine. Kohaku appears as a new student at his school and reunites with him, revealing that she not only has grown up, but she has also developed new telekinetic abilities.
Peter Pan Syndrome is written and illustrated by Mayu Sakai. It was serialized in the monthly manga magazine Ribon from the February 2005 issue released on December 28, 2004, to the October 2005 issue released on September 3, 2005. The chapters were later released in two bound volumes by Shueisha under the Ribon Mascot Comics imprint. Volume 2 includes an original short comic titled .
In 2004, Sakai stated on Ribons website that she came up with the story for Peter Pan Syndrome after coming up with the character Kohaku, saying that "rarely, the character came first." As the story contained fantasy elements, Sakai stated that it was difficult for her to draw it. One point she highlighted about Peter Pan Syndrome was the "innocent romance of middle school students", stating that she wanted to draw the main character being involved.
On March 1, 2016, M&C! announced that Peter Pan Syndrome had been licensed in English for Southeast Asian distribution.
Kono Manga ga Sugoi! praised Peter Pan Syndrome, stating that it depicts "the unbalanced minds of boys and girls who have just entered puberty" well. The story's balance and integration of fantasy elements in an everyday setting was also praised for making it "easier" for the target audience of Ribon to accept. Manga News described the first volume of "having nothing of interest", stating that the narrative was "not compelling" and that the "tragedy of losing [Kohaku's] mother doesn't haunt her as one may think." They stated the second volume slightly improved but the mystery was "disappointing". Manga Sanctuary praised the artwork and recommended the series to younger readers, stating that the story "had the makings of a good shà Âjo [manga]" for its romance, but older readers may not be interested for its lightheartedness and lack of depth in several of the themes, such as genetic experimentation.