Tonikaku Kawaii x Maou-jou de Oyasumi

Sshhh! Princess Syalis is trying to get a good night's sleep. Some shut-eye. Forty winks. Catch some Z's. Long ago in olden times when people and demons lived together in—well, disharmony, really – a demon king kidnaps a human princess and imprisons her in his castle. Bereft, the princess's subjects beat their chests in anguish…until a hero arises to spearhead Project Rescue Our Princess! While waiting for her knight in shining armor, what's an imprisoned princess to do …? Teddy-bear guards with bat wings are all very well, but her dungeon cell is bo-o-o-ring! So, she decides to wile away the long hours by sleeping. Now if only she could get comfortable…and didn't suffer from insomnia… (Source: VIZ Media)

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! (Source: VIZ Media) *Notes: The 16th volume includes the 4 chapter prequel "FLY ME TO THE MOON".*