From the day his parents named him, Nasa Yuzaki has felt connected to outer space...whether he likes it or not. His efforts to outperform the space program veer off course when an accident introduces him to Tsukasa, a mysterious girl with strange powers. Is she an alien, a moon goddess, or something else? Since she insists on marrying him, Nasa will have plenty of chances to find out!

Nasa and Tsukasa may have reconciled, but things aren't back to normal just yet. When she returns home, Tsukasa has to set her affairs back in order and make things right with the people who care about her. As she honors Tokiko's final wishes, she recalls how they made plans to reach the moon together and came tantalizingly close. Speaking of tantalizingly close, Tsukasa and Nasa find that after their time apart, it's harder than ever to sleep in side-by-side futons--and actually sleep!