(I have lot to Yap about jeez)
I'll also be rewriting the whole story (including [name] and ame since like it's like the whole isekai stuff) and it's stated in the book that they isekaid through [name]'s or ame's phone and played in the jp server since that they can't wait allat even though they don't know Japanese AT ALL
In short, they're both in the same world as yuu (they haven't met each other) and yes I plan to have yuu in the story too (maybe make them as one of the love interest too? Idk what do you guys think?)