The Garden of Words(2013)

Kotonoha no Niwa

Some people revel and play in the rain; others dread it and hide at the first drop. For high school student Takao, a summer shower is a source of artistic inspiration… but when he skips school in order to sketch in a rainy garden, Takao finds an even greater muse in Yukino, an older woman who seems adrift in the world. Despite the difference in their ages and lives, they strike up a comfortable relationship that slowly evolves as they randomly meet in the same garden whenever it rains. But with the rainy season coming to a close, Takao wonders if there's enough time left to put his feelings into actions and words.

(Source: Sentai Filmworks)