>>281372477
If her love for a concept/country replaces a romantic crush on a guy, then that makes her love for America romantic, and it means Denji got cucked hard with a sword up his ass no less. Since Yoru is a concept herself, it's normal for her to be romantically in love with another concept. Since Yoru is just a plot device, this America NTR is just foreshadowing of what Asa will do. Asa too will forget Denji and replace him with a new crush on the next guy, and you know that guy will be Yoshida.
The message of the story? Cherish what you have, because if you throw away your years long partner and family member to chase some new slut whom you barely know, you'll just be left broken, alone and homeless because she'll forget you overnight once a better guy appears. A typical as dirt moral message.
>Enjoy it while it lasts
Oh it will last until the very last chapter Poo.