Originally Posted by EvilAngel

All of them are available in Bonus Area, and for the new location..

Thank you for taking place in Elite Guard 5 and congratulations for the obtained rank!
Now that the event has ended, we are happy to announce that a new Area has been added to Stage 4, along with new cards and Hentai Scenes!
A new GHQ Mission is also available for this Area, running every Sunday from 10:00 AM to 12:00 AM EST!

Best of luck,
The PeroPero Team

Actually, you're off on this one. There are two new cards for 4-2 (both N), AND two unrelated cards for the bonus area. They are not available on any of the previous routes unless they have changed the routes. I suspect, that one of the earlier routes got changed and they were added there.

Either that, or they are exclusive to the bonus area.

For what it's worth, they seem to have a higher encounter rate. It took me about 1000 stamina to get them, but I got them both.