Best Ending, that could be maded.
Saito is Able to return his world any time he want, thanks to Louise's Spell.
At least he got merried with Louise, a real merried. (not like in Futatsuki no Kishi)
So everything has Ended.
There's No chance for any more series, meaby OVA about Saito and Louise days in Saito's World or Visit Saito's Parrents, but its only my speculations. Thats All
