Two years after his memorable school trip, Kakeru Kurosawa decides to visit Osaka once again with his former companions. Among this crew are the often-bullied Pizza-tan, the cheerful otaku Keiji Nagaoka, the energetic bookworm Magister Takigawa, and the timid Aya Kitahara—the main source of Kurosawa's troubles during their time in school.

The trip is off to a rocky start as Kurosawa is berated by his girlfriend for not inviting her along with the group. Coupled with drama between Keiji and Takigawa and a tense ferris wheel ride shared by Kitahara and Pizza-tan, the gathering quickly becomes more and more uneasy. Though these longtime friends reunited to rekindle their old bonds, the strains in their relationship threaten to end their meeting in total disaster.