Urusei Yatsura Movie 2: Beautiful Dreamer

Tomobiki High School is in a total uproar: there is only one day left until the school festival. All the students are working hard to finish their preparations and get home as soon as possible. Things are especially tough for Ataru's class, which has decided to set up a World War II-themed café. The centerpiece of their establishment is a Leopard tank, kindly provided by Shutaro Mendo. Most of the students are already dropping from exhaustion, but only Lum stays upbeat, dreaming that this day will never end.

In time, their teacher Onsen-Mark begins to feel a strange sense of déjà vu, and soon the others start to feel it too. Trying to figure out what is going on, the kids run into even greater mysteries and anomalies. The harder they try to understand what is happening, the more oddities they discover around them, and the familiar school and town begin to look less and less like the world they thought they knew.