YMMV / Protocol: Rain

• Aluminum Christmas Trees: In one scene Shun is seen baking a graphics card using the café's oven. GPU-baking exists in real life as a means to temporarily recover old graphics cards.
• Special Effects Failure: Even though it's a video game, it's not hard to point out that the graphics for the Xaxxerion animations are more reminiscent of the early 2000s than the 2020s. The CGI on the vehicles in the real world are not much better, with the 3D model for Yoshiko's car being a poor match for its 2D model.