Welcome to our board, mademoiselle
Regarding "Parallel love
" that is a popular Royai doujin,
* You can buy Japanese original at hellosugah for $12.00 (I believe there are other venders also, and this is just an example and not mean endorsing this particular vender by any means. ^^)
* I think Andie
on our board has part 1 of original Japanese doujinshi, if you'd like to find out her opinion of this doujinshi.
* For English translations of this, lianabanana7 on LiveJournal
has English translations for all 3 parts.
I'm sure there are other sources but this is the info I know. Hope others can help you with more info.^^