Kamifûsen (2011)

In an omnibus of four stories of which one is also called Kamifusen ('paper balloon') childhood friends grow up together and the girl's feelings change, in the second a high school teacher former female students and decide to revisit the school that ends in tragedy, in the third a house maid considers quitting prompting her mistress to become suspicious while in the last story a bored husband and wife take a day trip and begin playing a game.