As promised, we aren't waiting another six years for this one!
Here is Part 3. It picks up right after the last chapter, but just like the previous entry, you can actually read and enjoy this one completely on its own.
This release concludes the main storyline, though the author did release a tankoubon that includes bonus chapters and other stories where Iwana Ai makes appearances, so there is still more to hunt down if you check out the compiled volume!
Massive thanks to Anon for commissioning this batch and helping us keep the momentum going for this release!