@gmstr600 @kronix @coconut @chenando1
I mean the author just blatantly brought up the story of Kaguya-hime right in the first chapter or so, plus the MC is literally named Nasa, who has said that he would literally go to the moon and retrieve the girl he loves, and Tsukasa has a moon rock in her house so she feels more at home, plus Tsukasa can read Old Japanese, can tell the difference in weight between old Japanese swords and newer ones, has super strength and speed (and walk off a direct hit from a speeding truck), looks the same as as when she was when she saved Nasa from said truck (which was like 6 years ago). She also put down "16 years old" on her marriage form, which would have made her just 10 years old in the truck incident, and she obviously didn't look 10 years old then. She's also got telepathic powers (back in like Chapter 3 she was reading his mind when he said things in his head) and can tell that he's never lied to her. Her sister addresses her as with a "-sama" after her name and describes her as a glasswing butterfly that flutters through the night to the moon - and is apparently known to vanish if you take your eyes off her. The subtitle of the manga itself is "Fly me to the moon."
She's cleaaaaaaaaarly an immortal Kaguya-hime and at minimum 1300-1400 years old, if not more.
I'm fully expecting her to vanish one day, returning to the moon, perhaps because of a misunderstanding, blackmail, some kind of threat (she's got combat skills for a reason, a talented author isn't going to give her super strength + katana skills and not have her need them one day) or something idiotic like "nasa will be better off without me in his life!"..
And then Nasa-kun is going to do just like he promised at the very beginning when he says that if he were the one that loved Kaguya-Hime, he'd go to the moon and get her. She's going to go to the moon, he's going to use his super-smarts to take exams and graduate high school, go to college, study astronomy, join Japan's space program, become an astronaut and literally go to the moon to go get his wife and bring her back. Of course by then he'll be like... 25-30 years old, minimum (if we're being realistic about how long it takes to become an astronaut). Long time to be a virgin, but fuck it, he's already sleeping in the same room as his wife and is afraid to do more than kiss her.