Depending on construction, most of the time you sew things on from the inside, and then stuff it and sew the final hole close. Probably in particular the neck seam, since it's relatively prominent.
Unless you skip sleeping and eating, it's kind of hard to overwork yourself with a hobby. Or you're doing it to the point it's no longer enjoyable or you're getting physical injuries from it.
Such original sage names.
Wants BL, but nothing about herself. If there's anyone doubting she's pure female, that's it.
I think it's pretty cute that the MC in a story like this actually regressed mentally as well? Usually they're basically just their adult selves in a child body and it's kind of tiring. Nice change of pace.
Not sure if it's that unusual. Or it's just that authors are kind of bad at writing characters with mentalities older than your average manga school kid.