I am a photographer based in Seoul, Korea and can offer some prop ideas. Some good props are chalkboards (to write romantic or fun messages on), fake or real flowers (you can't tell that flowers are fake in photos), a sign that has your wedding date or "Mr." and "Mrs.", a banner of some kind, empty picture frames, picnic setup, a bike. There are many possibilities depending on the theme you're going for.
If anyone is ever interested in taking pre-wedding photos in Seoul, contact me. You can view my website
here.