I know you're all having fun reading into the black backgrounds but just my two cents, they were simply an odd aesthetic choice. they're on every page except the last one, pretty sure she was just trying to emphasize how it was dark outside/set the pensive mood.
that being said, this volume was re-released in 2018, as well as her first anthology collection Kimi-Iro Shoujo. If you're interested, you can purchase it here: https://www.amazon.co.jp/dp/4758078696
Why should you buy it? Well, it includes a totally new oneshot as well as bonus content for this story :) i could be tempted into buying and scanning it despite already owning the original release, if i knew it would help support the author...
last edited at Aug 21, 2019 8:31AM