Congrats on the release, NC!
It's always a treat to see one of your projects come together! Really looking forward to Tenshi no Uta, whenever it comes.
Thanks. With some life luck, hopefully Tenshi will be ready for testing in a few months. The main hacking work is done. However, the translation work is getting a second pass. There were some significant things missing in the original dump, and the existing script work was done without the knowledge of those pieces several years back. So, it all needs a touch up from the translator. After that, I will need to do a hacking finalization pass with everything fully in place. As it stands, it's just 'mostly' playable with some very annoying missing/broken things.

Good game and nice work! There seems to be some bug with the weather change during battle, since after performing it, there is some garbage text shown on top of the screen.
The amount of garbage seems to depend on who and which spell / action is used to change the weather (for example by using the Forecast command). Sometimes half of the screen gets full of garbage (with the weather change command of the fourth character that joins the party before arriving in Torantia Kingdom).
Can you give me more to go on? I'm not sure what character you're referring to. I'm going to guess Cairo the merchant perhaps at that point? The weather can be changed by monsters, regular characters, and several inhabitable bodies. I don't know who specifically matches up with the 'Forecast' command that you saw.
Do you happen to have an image showing this character or savegame where this bug can be found?