Kodokuna kagikko ga damasa rete kaibutsu mushura o tasukete shimaimasu. Yagate kare to kare no apāto no jūnin zen'in ga kinoko ningen ni kae rare, dorei ni sa rete shimaimasu.
A lonely latchkey kid is tricked into helping the monster Mushra, soon he and all the people in his apartment complex have been turned into mushroom people and are enslaved.
