Hi Kuantro!
It really, really, really, really REALLY would have been helpful if you have cared to mention what application you are talking about.
Be deduction, I have figured out that you are talking about Safari (most likely). The answer to your question is YES, you can do this, but not quite as you're expecting. Here's one way of doing what you want to do:
1. Visit the first page you want to have as a homepage and bookmark it.
2. Visit the second page and bookmark it.
3. Go to the Bookmarks area (the icon on the far left of the bookmarks bar) and gather those two bookmarks into a folder (plus sign on the bottom). Then put this folder into the Bookmarks bar.
4. Set your homepage to blank in preferences.
5. Now when you open your browser, simply click on the folder in the bookmarks bar and choose "open in tabs." Sorry, I don't know of any way to do that automatically, but at least it's only one click.
Alternate method:
Safari has a facility called "Top Sites." This is by default made up of the sites you visit most often, but by pressing the "Edit" button on the top sites "page" you can "pin" the two you are most interested in (I think the minimum number of sites in Top Sites is six).
If you set Top Sites as your "homepage," you now have six or so homepages to instantly choose from. Just command-click any of them to open in a new tab.