In Tokyo in the year 2030, 27-year-old Itakura Kakeru lives in a shared apartment. He is suddenly approached by Ogiwara Misae, his housemate three years his senior, about wanting his help to have a child. Kakeru has never even considered having a family before. But as he searches for an answer for Misae, he comes face to face with his parents, grandparents and younger sister who went their separate ways 15 years ago, and starts to consider what family is. And then, Kakeru gives more than a passing thought to the significance of being connected to someone.
Wataru, a freelance cameraman who works for a travel magazine in Tokyo. He had aimed to be a teacher but failed to achieve his goal and left home to go to Tokyo. However, he does not do well in Tokyo and has to return to his hometown. Wataru reunites with his former girlfriend who is a primary school teacher now and through his interaction with his family, friends and a group of primary school students who want to take part in a choir contest, he begins to take steps to resurrect his dream of being a teacher.
