Tonikaku Kawaii

First comes marriage, then comes an earthbound love that is out of this world!
From the day his parents named him, Nasa Yuzaki has been destined for outer space...or so he believes. But while trying to join the space program, he is thrown for a loop when an accident introduces him to Tsukasa, a mysterious girl who he falls in love with at first sight. Is she an alien, a moon goddess, or something else? Since she insists on marrying him, Nasa has plenty of chances to find out!