Mr. Osomatsu the Movie

Synopsis

After a humiliating high school reunion where their former classmates flaunt successful careers, relationships, and families, the Matsuno sextuplets retreat home, dejected by their NEET lifestyles. They drown their sorrows in alcohol, eventually passing out, only to awaken in a peculiar world formed from their collective memories, centered around a regretful experience from one brother's high school days. Exploring this memory-based world, the sextuplets encounter their younger, awkward selves along with those of their old friends. Their mission is to uncover which brother's regret has ensnared them in this surreal dimension and find a way back to reality. Time is running out, however, as this world begins to crumble, threatening to prevent them from rectifying their past mistakes.