Artist's commentary
The Strategy of Policing Public Morals in a School Swimsuit to Prevent Heat Stroke (see below)
It's Gomoyo-chan, made to change into the school swimsuit for the time being to prevent heat stroke, as part of a strategy to crack down on public morals.
A high quality version is available on Fanbox.
https://tokishiro.fanbox.cc/posts/7908763