The story revolves around Keiichi's quest to unravel the mysteries behind this phenomenon, while navigating his relationships with his friends and acquaintances. Along the way, he discovers that several people around him are somehow connected to the Solitary Confession System.

"Natsu ga Owaru made: Natsu no Owari - The Animation Portable" received mixed reviews from critics and audiences alike. Some praised the series for its thought-provoking themes and intricate plot, while others found it too confusing or unsettling.

Despite this, the series has developed a dedicated fan base over the years, with many appreciating its unique take on the psychological thriller genre. The franchise has also inspired various merchandise, including manga adaptations, novels, and drama CDs.

"Natsu ga Owaru made" (, lit. "Until the End of Summer") is a Japanese visual novel developed by 5pb. and released in 2006. The game was later adapted into an anime television series, "Natsu no Owari - The Animation Portable", which premiered in 2007.

The game and anime follow the life of Keiichi Katou, a 17-year-old high school student who experiences a mysterious and supernatural phenomenon known as the "Solitary Confession System". This system allows individuals to confess their feelings to someone they like, but with a twist: if the confession is accepted, the confessor will die.