Masaaki was born when Arisa was still young. - Although raising children was difficult, her husband was supportive and the family was happy. - However, when Masaaki entered university, her husband's affair was discovered, and the relationship between the couple suddenly turned cold. - They were no longer a husband and wife and were counting down the days until divorce. - Today, when Masaaki returns home for the first time in a long time after summer vacation begins, Arisa meets him at the station to tell him about the divorce.