See 700+ chps and got scared.. Is it worth it? Or is it okay for me to only watch the anim...

To me it's worth it! It's a masterpiece.

I see, guess I'll give it a try. How long does it take for you to finish it?

I'm not sure but it took a while because I read it when I was in elementary school and I was waiting the official tankobon to release in my country to be able to read it. You and others who found this manga now are lucky..