I looking for more than Arabian semes. Like for example, German, Poland, Irish, anything. Either the uke is visiting/taken-kinapped to the seme's homeland. And the foreign seme is a gang leader or something. 🙂
Thank you.

Technically, one of the semes in Finder is Chinese.

Ikoku Irokoi Romantan has an Italian seme...sadly he's no mafia leader but it does take place in Italy.

Do you count americans as foreigners? If so, Fake fits. And Itsuka Koi ga Kanau Made as well.

Gorgeous Carat - the uke is kidnapped by an Arabian seme, so it might not be what you want. I think he runs a drug ring. Shounen-ai, so whatever goes on isn't shown.

Casino Lily - seme is Italian

That's all I can remember.

Well, Under Grand Hotel features a foreign seme...so does Taiyou no Kikoushi

Brothers (YAMAMOTO Kotetsuko) has a British one (although it contains stepcest, so not sure if you're into that). Hitomi wa Umi no Iro has your exact specifications for the kidnapping part. The country he's from doesn't really exist, but he looks white even though the people from his country dress in the "Arabian" style.

Honoo no Suna ,Eternal Love, and A Promise of Romance (Novel) (British Seme). The last two are novels though. I hope that was at least sort of what you were looking for.

Excelence is is the result of caring more than others think is wise and dreaming more than others think is practical.