Atsuko (Ah-chan) and Kouhei (Kouhei) are both 29 years old and soon to bid farewell to their adolescence. Both think 29 is a good age to be at, but realize that it doesn't make them feel anymore grown up; both get along, but none actually want to be the first to take the plunge. After nine years of dating and living together for five, Atsuko and Kouhei are prompted to evaluate the nagging questions regarding their work, life, and the prospect of having children: What will we do? What will happen to us?