The MC will probably end with Shiro(99%)...why? Bcz as MC said she's his "1st love"...that would be the main reason, secondly bcz all or almost all MCs go with the "1st love"...the best example would be RE zero...even tho that's not a romcom...but the point is that even tho Rem tried her best and shit, nothing changed, that bastard just simply could not love someone else, expect that damn elve...
Also if you didn't get it the author's already trying to make us side with Kuro or smth...with each chapter it seems to hint that Kuro's a manipulative bitch and that when MC goes out with Shiro later on, near the end..."we should not feel sorry for her...anyways she already did her best even after playing dirty...so don't pity her...you fucking retards that are reading/watching my masterpiece just focus on the adorable pairing and forget that manipulative bitch" kind of excuse...so yeah the best ending would be either killing all of them or MC going harem route(that's gonna be impossible, he can only do sepuku and reincarnate in a medieval/wuxia/ancient world)...
In all honesty, not worth your read or even watching the anime(maybe for the excellent animation?) If you take in consideration all the stuff I said...
So to summarize--->
Without taking in account the title:
1) MC ends with Shiro(99%)
2) MC ends with Kuro(0,9%)
3) MC ends with the 3rd girl(0,1%)
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With the title:
4) All characters die/no one dates-best ending....
We have an idiot MC/even a donkey could do a better job, but what did you expect of your standard Japanese model MC?
We have our "manipulative" childhood friend
We have our "1st love, but she rejects you" type of girl
We have our "childhood friend" that isn't obsessed with him and probably the healthiest of all mentally speaking(at least that is what author showed us)
We have MC's friend, who plays as the "supporting"...he helps MC in the light and in the dark helps Kuro...
5) X dies, Y goes to travel/moves away/back to Hollywood or whatever and Z and MC end in a pairing
6) Harem ending(impossible, tho would be "good", bcz at least like that wouldn't hurt the girls like a rejection or smth IMO
7) By the click-bait title it seems to hint that the childhood friend won't gonna lose no matter what....which can lead to:
A) Kuro kills Shiro/MC, so no one gonna be happy
B) Kuro gonna suicide after being "rejected" and this makes MC feel guilty bcz indirectly or not, it's his fault for being a idiot all the fucking time...jesus...and the author, worse than a donkey if he makes this happen
As you can see all endings are as cliche as they can be...but I doubt the author gonna make something different...after all to make this joke of a series where someone rejects me, I cry pathetically and then I plan to get revenge just to discover that SURPRISE ALL A MISUNDERSTANDINGS as ALWAYS...and then it transforms into more melodrama (the reason people take it as a joke)....
If you guyz read this far...point more "possibilities"/"viable options" that you think I didn't add