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 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!Having grown up ridiculed for his bizarre name, Nasa Yuzaki strives to be remembered for something more. Fortunately, it seems he’s on the right path, ranking first in the nation’s mock exams and set to enter his high school of choice. However, everything changes in a single night when he notices a girl across the street on his way home. Enraptured by her overwhelming cuteness, it’s love at first sight for Nasa. But in his infatuated daze, he fails to notice the approaching danger speeding down the road and finds himself at death’s door. Barely alive thanks to the girl’s intervention, Nasa musters the courage to confess his love to her, fearing she might otherwise vanish from his life. She accepts his proposal on one condition: marriage, to which Nasa gladly accepts before passing out from his injuries. Upon waking, however, the girl is nowhere to be found. After recovering from his injuries, Nasa tosses his previous ambitions aside and dedicates his life to finding the girl that captured his heart, yet several years pass to no avail. But one night, when an unexpected visitor comes knocking on his door, Nasa finds himself facing a woman that would forever change his world: his wife.