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's teaching gig at a girls' school has introduced the gang to new friends and new opportunities for fan service, but none of the students are as puzzling as Kaguya, the brilliant, mercurial "princess" with an unknown connection to Tsukasa. It'll take the full force of Nasa's brainpower to get to the bottom of this mystery, but he's busy digging a pit in the yard so his wife can watch him get all sweaty. Maybe he can cool off with a trip to a haunted mansion!