Sky Cannot Be This Blue

空がこんなに青いわけがない

Also known as 하늘이 이렇게 푸를 리 없다

Kantarou Kobayashi is an ordinary businessman who has multiple troubles on hand. He's been having an affair with a woman working in the same company, but she does lots of eccentric things. His wife has no interrest in anything but her plan to build a new apartment where their old house is. His son suffers skin eruptions. His mother appears to have senile dementia.