Saiph

The best tool is Textractor, because it hooks the text from the VN and translates it. Also there's an amazing translator called Sugoi Japanese Translator but you will need a text hooker like Textractor or ITHVNR.

I managed to repack it but just the first word appears xDD, the whole sentence is "It was a summer day when the cicadas were chirping annoyingly."

Oh! thank you so much for your quick response and for your help! The version of the engine is indeed 555, now the problem is idk how to find out the key ;-; as I told you, I'm so noob for this stuff xD The thing is I'm trying to add MTL translations made with DeepL (they're pretty decent), so I successfully managed to unpack the scenario.ypf file with GARbro to edit the files, but the tough thing is repacking it Well, I actually managed to repack the file with YuRIS Tools by fengberd but: I can't open it on GARbro like the original one (this is a bad signal lmao) When trying to open the game it doesn't open and sometimes these windows appears Anyways, thank you so much for your help ^^ I'll try it with the YPF Manager Tool~

Thank you so much for doing this guide! I managed to unpack a YPF file but now I'm having trouble to repack it The thing is I'm a newbie in all this stuff, what means I don't know how to identify the game version or its repacking algorithm... Because when I follow the steps this happens: Btw the game is this.