Osomatsu-san Movie

A high school reunion forces the six Matsuno brothers to confront an uncomfortable truth: while their former classmates have built careers, relationships, and families, the sextuplets are still unemployed and going nowhere. Humiliated, they return home, drink themselves into oblivion, and wake in a bizarre world made from their high school memories.

There they encounter younger versions of themselves and their friends, along with moments they would rather have forgotten. The world exists because one of the brothers carries a regret strong enough to trap them all, but nobody knows whose. As the memories begin to collapse, the six must find the unresolved past at the center of it all before they lose their chance to return home.