Yes, The Future Diary (Mirai Nikki). I've watched it 2 1/2 times and reading the manga. I just love how dark, gory and exciting it gets and the final plot twist you never see coming. I love most, if not all the characters especially the legendary Yuno Gasai. If you have not seen this anime yet please do yourself a favor and go watch it, it's 26 episodes with an ova called mirai nikki redial.