婚后五年，在某网络公司上班的髙野干夫（堺雅人 饰）和毫不卖座的漫画家妻子小晴（宮﨑あおい 饰）过着平静的生活。干夫为人纤细，一丝不苟，习惯每天早上做便当，按照不同日期搭配便当的奶酪和领带。With the summer in the sea, she draws the relationship between her younger brother and her older sister who is shaking out.
