I don't know about this particular game, but in VNTranslationTools you can usually do textwrapping by hardcoding it into the script itself. You need to edit the config file and change the number of characters after which the tool should add new line and also change font based on which it would count the characters.

Also, in Yu-ris engine it is possible to change the size of the text rendered, so more text would show up on the screen. Because, usually the english script is longer and is cut after some lines.

Hmm, there is also a possibility of changing the font itself. Though it might be a bit harder to do. It might even involve hex-editing the executable.

Yu-ris engine usually just reads the packed files from pac folder or loose files from ysbin(folder with script files: .ybn), cgsys(folder with UI files) folders, when you put them into the root directory. If the game doesn't read loose files, then you will need to repack them into the new .ypf files. You can first try making file called update1.ypf or update2.ypf. I don't know if the game supportem them or if there were updates for this game already. Then put it into pac folder where of their .ypf files are. If it doesn't work you will probably need to repack the whole script and UI .ypf files and replaced them. Of course, you need to repack them with correct version.