Ima, ai ni yukimasu

Mio's death leaves husband Takumi and 6 year old son Yuji fending for themselves. Taku occasionally suffers fainting spells, is disorganized, and fears that his health hindered Mio's happiness. Yuji overheard relatives speculate that his delivery compromised her health, and he blames himself for her death. Mio left him a picture book in which she departs for "The Archive Star" but re-appears during the rainy season the following year, and he eagerly awaits her return. (imdb.com)