Jinta „Jintan" Yadomi wird von einer Nervensäge gequält, die nur er zu sehen scheint: Meiko „Menma" Honma. Diese will, dass Jintan ihr einen Wunsch erfüllt, doch welchen, scheint sie nicht genau zu wissen. Später trifft er auf alte Freunde, doch das Wiedersehen läuft gründlich schief...
Jinta Yadomi begins being pestered by a girl named Meiko "Menma" Honma, who only Jinta can see her. Meika says she wants to fulfill a wish, albeit one that she can't remember, and wanted to get all her old friends together. One of those former friends, Naruko "Anaru" Anjō, drops by Jinta's house to drop off some homework, but is on bad terms with Jinta. As Meiko pesters Jinta to go to Naruko and talk about her, they both go into the city where they run into two other former friends, Chiriko "Tsuruko" Tsurumi and Atsumu "Yukiatsu" Matsuyuki, the latter of which reacts harshly when Jinta accidentally drops Meiko's name. Frustrated, Jinta runs off and leaves Meiko behind. Jinta recalls that he, Meiko and their other friends were part of a group known as the Super Peace Busters that hang out together. One day, Jinta accidentally hurt Meiko's feelings when asked if he liked her, but Meiko died in a accident before he could apologise to her. Meanwhile, Meiko visits her family's house. As Jinta decides to search for Meiko, he checks out their old treehouse where he runs into his other old friend, Tetsudō "Poppo" Hisakawa.
À sa grande surprise, Jintan, jeune homme vivant reclus, reçoit un jour la visite de l'esprit de Menma, une amie d'enfance, qui lui demande d'exaucer son vœu.
L'apparizione del fantasma della compagna di giochi Menma lascia scosso il giovane Jinta, il protagonista della serie.
引き篭もり気味の主人公「じんたん」の前に、幼馴染みの少女「めんま」が突然現れる。
自分の願いを叶えて欲しいと頼む「めんま」に途惑う「じんたん」は…。
은둔형 외토리 기미를 보이는 주인공 '진탄' 의 앞에 소꼽 친구였던 소녀, '멘마'가 갑자기 나타나게 된다. 자신의 소원들 이루어 달라고 부탁하는 멘마. 그런 옛 소꼽친구를 보며 '진탄'은 망설이게 되는데...
Aunque en el pasado tuvo un buen grupo de amigos, Jintan es ahora un joven solitario y amargado que pasa los días jugando videojuegos y que no tiene esperanzas de futuro. Cuando en pleno verano aparece ante él Menma, una chica que murió años atrás, su primera impresión es clara: alucinaciones provocadas por el calor del verano y su trauma.
