^ It is still unique in the aspect that in normal H games you "score" in the end with one character, while here Makoto is screwing all over the place... even though you are supposed to have control over him
Assuming we get a "normal" ending - my money is on Sekai. For the sole reason that i prefer Kotonoha by a mile, but it is a long known fact that "my girl" never wins
... and the chances of him ending up with another girl are pretty minuscule (could you even achieve that in the game ?)