The Last Days of the World (2011) on Netflix

Plot summary

Kanou is a bored high school student. A tiny man appears before him with news that the planet will soon be wiped out. With almost no time left, Kanou chooses to spend it doing exactly what he wants. He hits a classmate and takes Yumi, a girl he has feelings for, away with him, intending to sleep with her, but he has never done that before and does not know how to start. A mysterious voice on the radio advises him to use his mayonnaise. His travels bring him to a middle-aged cosplayer, who invites him to a party of strange people.