Also since there's 2 Filipino peeps in the comments Imma make this jokey comparison
Chiyo is the generic Filipino teenager tv series protagonist(like Dr Analyn)
While Morikita is the generic Filipino "adult" tv series protagonist(like Marian's alien character)... I put the adult in quotations...
The thing that differentiates Morikita with Chiyo isn't just their age, it's also the core reason on why they became "stickler to the rules"
Morikita is older so she has been repressed for a longer time but her reason is because it's what her parents told her to do.
Meanwhile Chiyo only has...
Honestly Nakamura-sensei putting the specific line of alt Nano not being able to revisit alternate multiverse she already visited is a great way to not mess with a multiverse GF(especially since alt Nano is just Nano without meeting Chadtarou).
Alternate versions of characters really just makes...
Isn't edging also a heavy kink?
And majority of ero manga(not manhwa) tend to overuse "edging the readers" to pretty much milk the series to be longer.
As a MuseDash player I feel obligated to hope that we get a character named Pero Perori/Peroro(all hail the birb), although she might "clash" with Kurumi.
2nd solo Chiyo chapter that focuses on letting her accept that she can act her age and having an amazing mature looking Chiyo at the end... I love the Chiyo bias.
Additionally on a real world standpoint...
Speaking from experience, yes schools/academies/colleges can get petty when it comes tou your background and relationship status(and the background of your partner)... And this is considering I came from a country that is "least Asian" in consideration...