Spring, 1941. Sixteen-year-old Toshihiko attends school in the coastal town of Karatsu, where his aunt cares for his ailing cousin. Immersed in the seaside's nature and culture, Toshihiko soon befriends the town's other extraordinary adolescents as they all contend with the war's gravitational pull.
Tae Ukishima works at the front desk for a company. Her dream is to marry a competent man and live as a housewife. Her boyfriend is Shunpei Shiraishi and he works at the same company. They have dated for the past year. To marry him, Tae Ukishima pretends to act like a naive and shy person in front of him. Her real personality though is to speak frankly and making sharp remarks. Tae Ukishima wants to relieve her stress and she decides to purchase Jun Setsuna as her boyfriend. To pay off his debt, Jun Setsuna becomes an obedient boyfriend to Tae Ukishima.
Ordinary salaryman Hamasaki Mitsuo works for a company which installs vending machines. He complains about his marriage life while at the dentist office. Mitsuo isn't happy at all with his marriage with his wife, Hoshino Yuka, who has the complete opposite personality from him. He doesn't know if he loves Yuka or not. At this time, Mitsuo meets Kono Akari, his ex-girlfriend from his university days, who is now married to Uehara Ryo.
