
What's the point?
1. T&A
2. Comedy
3. Projection - At first, the harem genre was more of an ante up on typical love triangles to grab attention. Now, it is sustained by projection fantasy, wherein the reader puts themselves in the enviable shoes of the protagonist. It poses the question to the reader, "Who would you pick?" by showcasing a wide range of girls and often ends ambiguously so no one's 'choice' is wrong. Wataru could easily choose no one, with the last chapter of him starting college, only to be pursued by all the girls as the curtain closes.
4. Curiosity - "Will the author surprise us?" The 'clear winner' might not actually prevail.
5. Catharsis - Even if you know how it will end, the journey can still be satisfying in its own right. We know the hero generally gets the girl, for instance, but that doesn't stop us from enjoying the ride.
If you're just into a story for the ending, skip to the last page and save yourself the trouble -- but how much fun would that be?
By the way, you call it "fake love", but what you really mean is, "I don't understand why each character loves him." The latter is a question that can propel your interest, as a competent author will answer it over the course of the story. Instead, what you've done is preemptively concluded there are no answers, not giving the story a chance to flesh itself out.

lols, if you dont know what the fake love reference is, then there is no point to this discussion.
Anyway, iirc, you are that self righteous guy that likes to preach the correct way right? Everything has something that is supposed to happen, right? Its all supposed to happen.

What, are you talking about Nisekoi?
Self-righteous, huh? I don't recall talking much about morality or justice. "Preach the correct way" of what? Your description sounds like some kind of cult leader with your vague way of speaking. I don't really understand what you're getting at with those last two sentences, either.

Oh, I see now, you must be that Anon from the Goblin Slayer "deserved" comment thread.
The fact you labelled me religious just because I mentioned morality over there is humorous to me, considering I'm atheist. Religion does not own morality, it co-opted it. Morality originates from social instincts. Those instincts are an important evolution for group animals.
As for your Nisekoi reference, that was frankly pretty ambiguous, and inaccurate. The most recent anime aired two years ago, and its English title is "False Love", not "Fake Love." The only clue you gave us to go on are the quotation marks around the first of three uses of "fake", but quotations can mean any number of things, such as emphasis, irony, mockery, sarcasm, etc. You didn't even capitalize it like a proper title, and there are many like me who are used to the transliterated title (Nisekoi) rather than the translated one (False Love).
The reference would have wit if you were going for a double meaning, like associating this manga to Nisekoi while also insinuating how harems like this manga feel like the love is artificial. But, if you were trying to make that point, which seemed to be the case given your second and third use of the term, then my criticism would still stand. But your followup condescension of, "then there is no point to this discussion," leads me to believe you didn't think so deeply.
In any case, I'll readdress your original post while mindful of the Nisekoi reference: I don't think this manga is comparable to Nisekoi on the issue of having an obvious couple. The whole premise of Nisekoi is centered around how the main character and main heroine must fake their relationship to appease their respective families. The harem element is cast as secondary to that plot hook. Meanwhile, this manga is entirely a harem from the get-go, and the "First Girl Wins" trope is subverted in several ways:
http://tvtropes.org/pmwiki/pmwiki.php/Main/FirstGirlWins
1. First Girl the Reader Sees - The very first establishing shot of any character in chapter 1 is of three of the girls meeting at the airport. The first dialogue is about those girls being rivals in love (i.e. harem).
2. First Girl the MC Met - The photo of them as children showed he met and knew all the pact girls together as a group.
Now, Tomo definitely sticks out the most because her relationship with Wataru uniquely originates outside The Pact circle, she has a 10-year history with him, and her reluctance to admit her feelings drives up the tension. But naming her the "predetermined winner" is shaky, due to the distinct premise of this manga: the Marriage Pact. Harem is not secondary here, it is not a foil, it is the focus from the onset.
The fact that Wataru has admitted Tomo is in the lead can also be seen as the author telling us that he knows our expectations and that we might be up for a curve ball to surprise those expectations.
This "fake love" is still ongoing? Just end it already, how is this any different from the other fake love manga? If you have a predetermined winner in a game, there is no point to waste our time with a fake harem.