Yuzaki Nasa’s first name has the kanji for “Starry Night,” but it’s pronounced as “Nasa”. He tries to be well-suited for his strange name by always aiming for the top. But one snowy night, he lets his guard down and gets hit by a car while chasing after a cute girl.
The girl, Tsukasa Tsukuyomi, saves him, and Nasa takes that moment to confess to this mysterious and cute stranger! Tsukasa agrees to go out with him...but only if they get married! Fast forward a few years and Nasa opens his door to see Tsukasa, who calls him her husband! Thus begins their strange married life.