Koibumi

Shouichi (Watabe Atsuro) is an art teacher with a very eccentric style. He basically has the personality of a young boy who does things that he feels are right, and doesn't really think too much about the consequences of his actions. Shoichi's wife, Kyouko (Mizuno Miki), is a no-nonsense mother figure that always has to clean up after Shoichi's mistakes. Their two personalities strike a balance and they enjoy a happy life together with their son, Suguru, who has grown up to be more responsible to make up for his father's childishness.
One day, his former lover Etsuko (Wakui Emi) shows up at his school, and tells him that she is dying from a terminal illness and has only six months to live. Shouichi decides to be with her until her death, so he quits his job, leaves his family, and finds a new job so he can spend more time with Etsuko at the hospital. Kyouko wakes up to find her husband gone with no explanation, and goes out in search of him...