Tonikaku Kawaii - Season 1
First comes marriage, then comes an earthbound love that is out of this world. From the day his parents named him, Yuzaki Nasa 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 with strange powers. Is she an alien, a moon goddess or something else? Since she insists on marrying him, Nasa has plenty of chances to find out.
