>>3001535I imagine she comes from a world similar to this one:
https://vndb.org/v12931where some jobs allow the requirement of girls being almost naked. For example, to attract customers or service guests. Which is why they're allowed to travel from work to home wearing their work mini aprons. Of course they're embarrassed because everyone around them is clothed but if they change into their school uniform they'll be caught having a job outside of school and get in trouble so their only choice is to ride the train in naked apron but 99.9% of people on the street should be properly clothed which makes their embarrassment higher.
Also, they're never naked. Sakura is only naked when she's in the bathroom, showering, and masturbating on her bed. The least they wear is their work aprons. So wearing a transparent nightgown without panties is pretty normal, especially in warm weather.
Fun fact. Millennials and Gen Z were polled a few years ago about their sleepwear. The #1 answer was naked. So it's hardly unusual even in our world.
I should do a day for Lyra, one for Aria and one for Talitha but I burned myself out.