Hey Sutibaru.
I watch that anime alot. Believe me, it is funny. You can watch in On Demand in Anime Network. But if you really wanted to see someone hot will boobs on that show you shold see Ms. Mune-Mune. She appear in the second esipode until the last esipode. She is also Sasshi's grandma.
In that comic, the boy's name is Sasshi & the girl's name is Arumi. Pretty much they travel to different verisons of their world but they don't know how to get back to their world.
By the way, I made my bit-torrent yahoo group called Tommy's Bittorrent Shop. I might have that anime as a bit-torrent poated there.
The address is:
http://groups.yahoo.com/group/tommy_bitts/.
Later!
P.S.
Here's a picture of Ms. Mune-Mune so you can see it.