Wait wait this can't be the end..? What about his twin?? His best friend? So others? Σ(...

I know right? what happens to Gabby? ┗( T﹏T )┛

I think it's because it's based of a visual novel that has multiple endings. If I'm right, the manga only does Neil's ending while if you play the game you can see the others.

ikr some are in the beginning like of some what importance but disappear from the story like they weren't worth it （/TДT)/ (just my feeling though ) the manga being based on a novel sounds like a legit reason

But reading this kinda makes you want to play the game and do the other characters paths just to see the story. Awesome advertising if you ask me. (￣▽￣)

Hm.. I agree with you on that! It's like a huge yummy chocolate cake and you only get a lil for sample tasting for free.. just so you'll buy the entire thing! But in the end it's worth it! (●￣(ｴ)￣●)

Whats the game name?

I'm not sure. I would assume it's of the same title but I think you could find out on a wiki page. I've never played the game myself but I'm familiar with the style of manga that are usually based off multiple ending games (they usually feel very incomplete and some other tells) so I guessed that this is one of them even though I've never played the game.

Oh thank you for taking time to write this much , actually i searched but i couldnt find it but i found out that it wasnt translate so i couldnt play it anyway.

Any time. ( ╹▽╹ )
That sucks about it not being translates yet. I could imagine there might be a fan translation somewhere on the internet but those are harder to find these days because of stricter licensing laws, the up in the official dub scene, and other stuff. Hopefully one day we can develop a program that will automatically accurately translate different languages.