Hibiki and Megumi are a biannual couple who have been dating for two years.A relationship where you can forget everything when you are together.Recently, however, Hibiki has been concerned about the unpopularity of being a "biannual couple." "I want to get married and have children..." And Hibiki makes up her mind.She chooses to break up with Megumi...Two weeks later, the two are back together again.The two meet again for the first time in a long time and love each other with all their might, as if to fill the blank time they had separated.