I have to admit that I have no idea why this is going around as news right now. I've seen a trailer for this over half a year ago. Maybe I'm missing something.

The latest installment in the "Your" series, Your Letter. Trailer

Observations

• The usual CoMix Wave quality is there. The bar they set is very high
• Like Flavors of Youth, it has a non-Japanese source material (Korean)
• With a Korean source material, I can't help but think if Lost in Starlight has some influence in it (LiS, in turn, was likely influenced by CoMix Wave's own Weathering With You)
• Korean VAs are still not up to par with Japanese VAs in terms of the acting itself and how their voices are mixed; considering the setting, it's overall a good thing that it is the original audio.